Merge github.com:grpc/grpc into c++api

Conflicts:
	Makefile

67 files changed, 1557 insertions, 227 deletions

diff --git a/Makefile b/Makefile
index 7753a174f8..fd6b479e65 100644
--- a/Makefile
+++ b/Makefile
@@ -75,6 +75,18 @@ OPENSSL_CONFIG_msan = no-asm
 LDFLAGS_msan = -fsanitize=memory
 DEFINES_msan = NDEBUG
 
+VALID_CONFIG_ubsan = 1
+REQUIRE_CUSTOM_LIBRARIES_ubsan = 1
+CC_ubsan = clang
+CXX_ubsan = clang++
+LD_ubsan = clang
+LDXX_ubsan = clang++
+CPPFLAGS_ubsan = -O1 -fsanitize=undefined -fno-omit-frame-pointer
+OPENSSL_CFLAGS_ubsan = -DPURIFY
+OPENSSL_CONFIG_ubsan = no-asm
+LDFLAGS_ubsan = -fsanitize=undefined
+DEFINES_ubsan = NDEBUG
+
 VALID_CONFIG_gcov = 1
 CC_gcov = gcc
 CXX_gcov = g++
@@ -455,9 +467,9 @@ qps_server: bins/$(CONFIG)/qps_server
 ruby_plugin: bins/$(CONFIG)/ruby_plugin
 status_test: bins/$(CONFIG)/status_test
 thread_pool_test: bins/$(CONFIG)/thread_pool_test
-tips_client: bins/$(CONFIG)/tips_client
-tips_publisher_test: bins/$(CONFIG)/tips_publisher_test
-tips_subscriber_test: bins/$(CONFIG)/tips_subscriber_test
+pubsub_client: bins/$(CONFIG)/pubsub_client
+pubsub_publisher_test: bins/$(CONFIG)/pubsub_publisher_test
+pubsub_subscriber_test: bins/$(CONFIG)/pubsub_subscriber_test
 chttp2_fake_security_cancel_after_accept_test: bins/$(CONFIG)/chttp2_fake_security_cancel_after_accept_test
 chttp2_fake_security_cancel_after_accept_and_writes_closed_test: bins/$(CONFIG)/chttp2_fake_security_cancel_after_accept_and_writes_closed_test
 chttp2_fake_security_cancel_after_invoke_test: bins/$(CONFIG)/chttp2_fake_security_cancel_after_invoke_test
@@ -805,13 +817,13 @@ privatelibs: privatelibs_c privatelibs_cxx
 
 privatelibs_c:  libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libend2end_fixture_chttp2_fake_security.a libs/$(CONFIG)/libend2end_fixture_chttp2_fullstack.a libs/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_fullstack.a libs/$(CONFIG)/libend2end_fixture_chttp2_simple_ssl_with_oauth2_fullstack.a libs/$(CONFIG)/libend2end_fixture_chttp2_socket_pair.a libs/$(CONFIG)/libend2end_fixture_chttp2_socket_pair_one_byte_at_a_time.a libs/$(CONFIG)/libend2end_test_cancel_after_accept.a libs/$(CONFIG)/libend2end_test_cancel_after_accept_and_writes_closed.a libs/$(CONFIG)/libend2end_test_cancel_after_invoke.a libs/$(CONFIG)/libend2end_test_cancel_before_invoke.a libs/$(CONFIG)/libend2end_test_cancel_in_a_vacuum.a libs/$(CONFIG)/libend2end_test_census_simple_request.a libs/$(CONFIG)/libend2end_test_disappearing_server.a libs/$(CONFIG)/libend2end_test_early_server_shutdown_finishes_inflight_calls.a libs/$(CONFIG)/libend2end_test_early_server_shutdown_finishes_tags.a libs/$(CONFIG)/libend2end_test_empty_batch.a libs/$(CONFIG)/libend2end_test_graceful_server_shutdown.a libs/$(CONFIG)/libend2end_test_invoke_large_request.a libs/$(CONFIG)/libend2end_test_max_concurrent_streams.a libs/$(CONFIG)/libend2end_test_no_op.a libs/$(CONFIG)/libend2end_test_ping_pong_streaming.a libs/$(CONFIG)/libend2end_test_request_response_with_binary_metadata_and_payload.a libs/$(CONFIG)/libend2end_test_request_response_with_metadata_and_payload.a libs/$(CONFIG)/libend2end_test_request_response_with_payload.a libs/$(CONFIG)/libend2end_test_request_with_large_metadata.a libs/$(CONFIG)/libend2end_test_request_with_payload.a libs/$(CONFIG)/libend2end_test_simple_delayed_request.a libs/$(CONFIG)/libend2end_test_simple_request.a libs/$(CONFIG)/libend2end_test_thread_stress.a libs/$(CONFIG)/libend2end_test_writes_done_hangs_with_pending_read.a libs/$(CONFIG)/libend2end_test_cancel_after_accept_legacy.a libs/$(CONFIG)/libend2end_test_cancel_after_accept_and_writes_closed_legacy.a libs/$(CONFIG)/libend2end_test_cancel_after_invoke_legacy.a libs/$(CONFIG)/libend2end_test_cancel_before_invoke_legacy.a libs/$(CONFIG)/libend2end_test_cancel_in_a_vacuum_legacy.a libs/$(CONFIG)/libend2end_test_census_simple_request_legacy.a libs/$(CONFIG)/libend2end_test_disappearing_server_legacy.a libs/$(CONFIG)/libend2end_test_early_server_shutdown_finishes_inflight_calls_legacy.a libs/$(CONFIG)/libend2end_test_early_server_shutdown_finishes_tags_legacy.a libs/$(CONFIG)/libend2end_test_graceful_server_shutdown_legacy.a libs/$(CONFIG)/libend2end_test_invoke_large_request_legacy.a libs/$(CONFIG)/libend2end_test_max_concurrent_streams_legacy.a libs/$(CONFIG)/libend2end_test_no_op_legacy.a libs/$(CONFIG)/libend2end_test_ping_pong_streaming_legacy.a libs/$(CONFIG)/libend2end_test_request_response_with_binary_metadata_and_payload_legacy.a libs/$(CONFIG)/libend2end_test_request_response_with_metadata_and_payload_legacy.a libs/$(CONFIG)/libend2end_test_request_response_with_payload_legacy.a libs/$(CONFIG)/libend2end_test_request_response_with_trailing_metadata_and_payload_legacy.a libs/$(CONFIG)/libend2end_test_request_with_large_metadata_legacy.a libs/$(CONFIG)/libend2end_test_request_with_payload_legacy.a libs/$(CONFIG)/libend2end_test_simple_delayed_request_legacy.a libs/$(CONFIG)/libend2end_test_simple_request_legacy.a libs/$(CONFIG)/libend2end_test_thread_stress_legacy.a libs/$(CONFIG)/libend2end_test_writes_done_hangs_with_pending_read_legacy.a libs/$(CONFIG)/libend2end_certs.a
 
-privatelibs_cxx:  libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libtips_client_lib.a
+privatelibs_cxx:  libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libpubsub_client_lib.a
 
 buildtests: buildtests_c buildtests_cxx
 
 buildtests_c: privatelibs_c bins/$(CONFIG)/alarm_heap_test bins/$(CONFIG)/alarm_list_test bins/$(CONFIG)/alarm_test bins/$(CONFIG)/alpn_test bins/$(CONFIG)/bin_encoder_test bins/$(CONFIG)/census_hash_table_test bins/$(CONFIG)/census_statistics_multiple_writers_circular_buffer_test bins/$(CONFIG)/census_statistics_multiple_writers_test bins/$(CONFIG)/census_statistics_performance_test bins/$(CONFIG)/census_statistics_quick_test bins/$(CONFIG)/census_statistics_small_log_test bins/$(CONFIG)/census_stub_test bins/$(CONFIG)/census_window_stats_test bins/$(CONFIG)/chttp2_status_conversion_test bins/$(CONFIG)/chttp2_stream_encoder_test bins/$(CONFIG)/chttp2_stream_map_test bins/$(CONFIG)/chttp2_transport_end2end_test bins/$(CONFIG)/dualstack_socket_test bins/$(CONFIG)/echo_client bins/$(CONFIG)/echo_server bins/$(CONFIG)/echo_test bins/$(CONFIG)/fd_posix_test bins/$(CONFIG)/fling_client bins/$(CONFIG)/fling_server bins/$(CONFIG)/fling_stream_test bins/$(CONFIG)/fling_test bins/$(CONFIG)/gpr_cancellable_test bins/$(CONFIG)/gpr_cmdline_test bins/$(CONFIG)/gpr_env_test bins/$(CONFIG)/gpr_file_test bins/$(CONFIG)/gpr_histogram_test bins/$(CONFIG)/gpr_host_port_test bins/$(CONFIG)/gpr_log_test bins/$(CONFIG)/gpr_slice_buffer_test bins/$(CONFIG)/gpr_slice_test bins/$(CONFIG)/gpr_string_test bins/$(CONFIG)/gpr_sync_test bins/$(CONFIG)/gpr_thd_test bins/$(CONFIG)/gpr_time_test bins/$(CONFIG)/gpr_useful_test bins/$(CONFIG)/grpc_base64_test bins/$(CONFIG)/grpc_byte_buffer_reader_test bins/$(CONFIG)/grpc_channel_stack_test bins/$(CONFIG)/grpc_completion_queue_test bins/$(CONFIG)/grpc_credentials_test bins/$(CONFIG)/grpc_json_token_test bins/$(CONFIG)/grpc_stream_op_test bins/$(CONFIG)/hpack_parser_test bins/$(CONFIG)/hpack_table_test bins/$(CONFIG)/httpcli_format_request_test bins/$(CONFIG)/httpcli_parser_test bins/$(CONFIG)/httpcli_test bins/$(CONFIG)/json_rewrite bins/$(CONFIG)/json_rewrite_test bins/$(CONFIG)/json_test bins/$(CONFIG)/lame_client_test bins/$(CONFIG)/message_compress_test bins/$(CONFIG)/metadata_buffer_test bins/$(CONFIG)/murmur_hash_test bins/$(CONFIG)/no_server_test bins/$(CONFIG)/poll_kick_posix_test bins/$(CONFIG)/resolve_address_test bins/$(CONFIG)/secure_endpoint_test bins/$(CONFIG)/sockaddr_utils_test bins/$(CONFIG)/tcp_client_posix_test bins/$(CONFIG)/tcp_posix_test bins/$(CONFIG)/tcp_server_posix_test bins/$(CONFIG)/time_averaged_stats_test bins/$(CONFIG)/time_test bins/$(CONFIG)/timeout_encoding_test bins/$(CONFIG)/transport_metadata_test bins/$(CONFIG)/chttp2_fake_security_cancel_after_accept_test bins/$(CONFIG)/chttp2_fake_security_cancel_after_accept_and_writes_closed_test bins/$(CONFIG)/chttp2_fake_security_cancel_after_invoke_test bins/$(CONFIG)/chttp2_fake_security_cancel_before_invoke_test bins/$(CONFIG)/chttp2_fake_security_cancel_in_a_vacuum_test bins/$(CONFIG)/chttp2_fake_security_census_simple_request_test bins/$(CONFIG)/chttp2_fake_security_disappearing_server_test bins/$(CONFIG)/chttp2_fake_security_early_server_shutdown_finishes_inflight_calls_test bins/$(CONFIG)/chttp2_fake_security_early_server_shutdown_finishes_tags_test bins/$(CONFIG)/chttp2_fake_security_empty_batch_test bins/$(CONFIG)/chttp2_fake_security_graceful_server_shutdown_test bins/$(CONFIG)/chttp2_fake_security_invoke_large_request_test bins/$(CONFIG)/chttp2_fake_security_max_concurrent_streams_test bins/$(CONFIG)/chttp2_fake_security_no_op_test bins/$(CONFIG)/chttp2_fake_security_ping_pong_streaming_test bins/$(CONFIG)/chttp2_fake_security_request_response_with_binary_metadata_and_payload_test bins/$(CONFIG)/chttp2_fake_security_request_response_with_metadata_and_payload_test bins/$(CONFIG)/chttp2_fake_security_request_response_with_payload_test bins/$(CONFIG)/chttp2_fake_security_request_with_large_metadata_test bins/$(CONFIG)/chttp2_fake_security_request_with_payload_test bins/$(CONFIG)/chttp2_fake_security_simple_delayed_request_test bins/$(CONFIG)/chttp2_fake_security_simple_request_test bins/$(CONFIG)/chttp2_fake_security_thread_stress_test bins/$(CONFIG)/chttp2_fake_security_writes_done_hangs_with_pending_read_test bins/$(CONFIG)/chttp2_fake_security_cancel_after_accept_legacy_test bins/$(CONFIG)/chttp2_fake_security_cancel_after_accept_and_writes_closed_legacy_test bins/$(CONFIG)/chttp2_fake_security_cancel_after_invoke_legacy_test bins/$(CONFIG)/chttp2_fake_security_cancel_before_invoke_legacy_test bins/$(CONFIG)/chttp2_fake_security_cancel_in_a_vacuum_legacy_test bins/$(CONFIG)/chttp2_fake_security_census_simple_request_legacy_test bins/$(CONFIG)/chttp2_fake_security_disappearing_server_legacy_test bins/$(CONFIG)/chttp2_fake_security_early_server_shutdown_finishes_inflight_calls_legacy_test bins/$(CONFIG)/chttp2_fake_security_early_server_shutdown_finishes_tags_legacy_test bins/$(CONFIG)/chttp2_fake_security_graceful_server_shutdown_legacy_test bins/$(CONFIG)/chttp2_fake_security_invoke_large_request_legacy_test bins/$(CONFIG)/chttp2_fake_security_max_concurrent_streams_legacy_test bins/$(CONFIG)/chttp2_fake_security_no_op_legacy_test bins/$(CONFIG)/chttp2_fake_security_ping_pong_streaming_legacy_test bins/$(CONFIG)/chttp2_fake_security_request_response_with_binary_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_fake_security_request_response_with_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_fake_security_request_response_with_payload_legacy_test bins/$(CONFIG)/chttp2_fake_security_request_response_with_trailing_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_fake_security_request_with_large_metadata_legacy_test bins/$(CONFIG)/chttp2_fake_security_request_with_payload_legacy_test bins/$(CONFIG)/chttp2_fake_security_simple_delayed_request_legacy_test bins/$(CONFIG)/chttp2_fake_security_simple_request_legacy_test bins/$(CONFIG)/chttp2_fake_security_thread_stress_legacy_test bins/$(CONFIG)/chttp2_fake_security_writes_done_hangs_with_pending_read_legacy_test bins/$(CONFIG)/chttp2_fullstack_cancel_after_accept_test bins/$(CONFIG)/chttp2_fullstack_cancel_after_accept_and_writes_closed_test bins/$(CONFIG)/chttp2_fullstack_cancel_after_invoke_test bins/$(CONFIG)/chttp2_fullstack_cancel_before_invoke_test bins/$(CONFIG)/chttp2_fullstack_cancel_in_a_vacuum_test bins/$(CONFIG)/chttp2_fullstack_census_simple_request_test bins/$(CONFIG)/chttp2_fullstack_disappearing_server_test bins/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_test bins/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_tags_test bins/$(CONFIG)/chttp2_fullstack_empty_batch_test bins/$(CONFIG)/chttp2_fullstack_graceful_server_shutdown_test bins/$(CONFIG)/chttp2_fullstack_invoke_large_request_test bins/$(CONFIG)/chttp2_fullstack_max_concurrent_streams_test bins/$(CONFIG)/chttp2_fullstack_no_op_test bins/$(CONFIG)/chttp2_fullstack_ping_pong_streaming_test bins/$(CONFIG)/chttp2_fullstack_request_response_with_binary_metadata_and_payload_test bins/$(CONFIG)/chttp2_fullstack_request_response_with_metadata_and_payload_test bins/$(CONFIG)/chttp2_fullstack_request_response_with_payload_test bins/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_test bins/$(CONFIG)/chttp2_fullstack_request_with_payload_test bins/$(CONFIG)/chttp2_fullstack_simple_delayed_request_test bins/$(CONFIG)/chttp2_fullstack_simple_request_test bins/$(CONFIG)/chttp2_fullstack_thread_stress_test bins/$(CONFIG)/chttp2_fullstack_writes_done_hangs_with_pending_read_test bins/$(CONFIG)/chttp2_fullstack_cancel_after_accept_legacy_test bins/$(CONFIG)/chttp2_fullstack_cancel_after_accept_and_writes_closed_legacy_test bins/$(CONFIG)/chttp2_fullstack_cancel_after_invoke_legacy_test bins/$(CONFIG)/chttp2_fullstack_cancel_before_invoke_legacy_test bins/$(CONFIG)/chttp2_fullstack_cancel_in_a_vacuum_legacy_test bins/$(CONFIG)/chttp2_fullstack_census_simple_request_legacy_test bins/$(CONFIG)/chttp2_fullstack_disappearing_server_legacy_test bins/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_inflight_calls_legacy_test bins/$(CONFIG)/chttp2_fullstack_early_server_shutdown_finishes_tags_legacy_test bins/$(CONFIG)/chttp2_fullstack_graceful_server_shutdown_legacy_test bins/$(CONFIG)/chttp2_fullstack_invoke_large_request_legacy_test bins/$(CONFIG)/chttp2_fullstack_max_concurrent_streams_legacy_test bins/$(CONFIG)/chttp2_fullstack_no_op_legacy_test bins/$(CONFIG)/chttp2_fullstack_ping_pong_streaming_legacy_test bins/$(CONFIG)/chttp2_fullstack_request_response_with_binary_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_fullstack_request_response_with_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_fullstack_request_response_with_payload_legacy_test bins/$(CONFIG)/chttp2_fullstack_request_response_with_trailing_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_fullstack_request_with_large_metadata_legacy_test bins/$(CONFIG)/chttp2_fullstack_request_with_payload_legacy_test bins/$(CONFIG)/chttp2_fullstack_simple_delayed_request_legacy_test bins/$(CONFIG)/chttp2_fullstack_simple_request_legacy_test bins/$(CONFIG)/chttp2_fullstack_thread_stress_legacy_test bins/$(CONFIG)/chttp2_fullstack_writes_done_hangs_with_pending_read_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_accept_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_accept_and_writes_closed_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_invoke_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_before_invoke_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_in_a_vacuum_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_census_simple_request_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_disappearing_server_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_early_server_shutdown_finishes_inflight_calls_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_early_server_shutdown_finishes_tags_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_empty_batch_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_graceful_server_shutdown_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_invoke_large_request_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_max_concurrent_streams_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_no_op_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_ping_pong_streaming_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_binary_metadata_and_payload_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_metadata_and_payload_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_payload_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_request_with_large_metadata_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_request_with_payload_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_simple_delayed_request_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_simple_request_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_thread_stress_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_writes_done_hangs_with_pending_read_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_accept_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_accept_and_writes_closed_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_after_invoke_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_before_invoke_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_cancel_in_a_vacuum_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_census_simple_request_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_disappearing_server_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_early_server_shutdown_finishes_inflight_calls_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_early_server_shutdown_finishes_tags_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_graceful_server_shutdown_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_invoke_large_request_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_max_concurrent_streams_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_no_op_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_ping_pong_streaming_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_binary_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_payload_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_request_response_with_trailing_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_request_with_large_metadata_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_request_with_payload_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_simple_delayed_request_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_simple_request_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_thread_stress_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_fullstack_writes_done_hangs_with_pending_read_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_and_writes_closed_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_invoke_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_before_invoke_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_in_a_vacuum_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_census_simple_request_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_disappearing_server_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_early_server_shutdown_finishes_inflight_calls_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_early_server_shutdown_finishes_tags_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_empty_batch_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_graceful_server_shutdown_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_invoke_large_request_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_max_concurrent_streams_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_no_op_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_ping_pong_streaming_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_binary_metadata_and_payload_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_metadata_and_payload_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_with_large_metadata_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_with_payload_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_simple_delayed_request_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_simple_request_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_thread_stress_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_writes_done_hangs_with_pending_read_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_accept_and_writes_closed_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_after_invoke_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_before_invoke_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_cancel_in_a_vacuum_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_census_simple_request_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_disappearing_server_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_early_server_shutdown_finishes_inflight_calls_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_early_server_shutdown_finishes_tags_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_graceful_server_shutdown_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_invoke_large_request_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_max_concurrent_streams_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_no_op_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_ping_pong_streaming_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_binary_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_payload_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_response_with_trailing_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_with_large_metadata_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_request_with_payload_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_simple_delayed_request_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_simple_request_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_thread_stress_legacy_test bins/$(CONFIG)/chttp2_simple_ssl_with_oauth2_fullstack_writes_done_hangs_with_pending_read_legacy_test bins/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_test bins/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_and_writes_closed_test bins/$(CONFIG)/chttp2_socket_pair_cancel_after_invoke_test bins/$(CONFIG)/chttp2_socket_pair_cancel_before_invoke_test bins/$(CONFIG)/chttp2_socket_pair_cancel_in_a_vacuum_test bins/$(CONFIG)/chttp2_socket_pair_census_simple_request_test bins/$(CONFIG)/chttp2_socket_pair_disappearing_server_test bins/$(CONFIG)/chttp2_socket_pair_early_server_shutdown_finishes_inflight_calls_test bins/$(CONFIG)/chttp2_socket_pair_early_server_shutdown_finishes_tags_test bins/$(CONFIG)/chttp2_socket_pair_empty_batch_test bins/$(CONFIG)/chttp2_socket_pair_graceful_server_shutdown_test bins/$(CONFIG)/chttp2_socket_pair_invoke_large_request_test bins/$(CONFIG)/chttp2_socket_pair_max_concurrent_streams_test bins/$(CONFIG)/chttp2_socket_pair_no_op_test bins/$(CONFIG)/chttp2_socket_pair_ping_pong_streaming_test bins/$(CONFIG)/chttp2_socket_pair_request_response_with_binary_metadata_and_payload_test bins/$(CONFIG)/chttp2_socket_pair_request_response_with_metadata_and_payload_test bins/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_test bins/$(CONFIG)/chttp2_socket_pair_request_with_large_metadata_test bins/$(CONFIG)/chttp2_socket_pair_request_with_payload_test bins/$(CONFIG)/chttp2_socket_pair_simple_delayed_request_test bins/$(CONFIG)/chttp2_socket_pair_simple_request_test bins/$(CONFIG)/chttp2_socket_pair_thread_stress_test bins/$(CONFIG)/chttp2_socket_pair_writes_done_hangs_with_pending_read_test bins/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_legacy_test bins/$(CONFIG)/chttp2_socket_pair_cancel_after_accept_and_writes_closed_legacy_test bins/$(CONFIG)/chttp2_socket_pair_cancel_after_invoke_legacy_test bins/$(CONFIG)/chttp2_socket_pair_cancel_before_invoke_legacy_test bins/$(CONFIG)/chttp2_socket_pair_cancel_in_a_vacuum_legacy_test bins/$(CONFIG)/chttp2_socket_pair_census_simple_request_legacy_test bins/$(CONFIG)/chttp2_socket_pair_disappearing_server_legacy_test bins/$(CONFIG)/chttp2_socket_pair_early_server_shutdown_finishes_inflight_calls_legacy_test bins/$(CONFIG)/chttp2_socket_pair_early_server_shutdown_finishes_tags_legacy_test bins/$(CONFIG)/chttp2_socket_pair_graceful_server_shutdown_legacy_test bins/$(CONFIG)/chttp2_socket_pair_invoke_large_request_legacy_test bins/$(CONFIG)/chttp2_socket_pair_max_concurrent_streams_legacy_test bins/$(CONFIG)/chttp2_socket_pair_no_op_legacy_test bins/$(CONFIG)/chttp2_socket_pair_ping_pong_streaming_legacy_test bins/$(CONFIG)/chttp2_socket_pair_request_response_with_binary_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_socket_pair_request_response_with_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_socket_pair_request_response_with_payload_legacy_test bins/$(CONFIG)/chttp2_socket_pair_request_response_with_trailing_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_socket_pair_request_with_large_metadata_legacy_test bins/$(CONFIG)/chttp2_socket_pair_request_with_payload_legacy_test bins/$(CONFIG)/chttp2_socket_pair_simple_delayed_request_legacy_test bins/$(CONFIG)/chttp2_socket_pair_simple_request_legacy_test bins/$(CONFIG)/chttp2_socket_pair_thread_stress_legacy_test bins/$(CONFIG)/chttp2_socket_pair_writes_done_hangs_with_pending_read_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_census_simple_request_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_disappearing_server_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_empty_batch_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_no_op_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_payload_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_thread_stress_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_writes_done_hangs_with_pending_read_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_accept_and_writes_closed_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_after_invoke_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_before_invoke_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_cancel_in_a_vacuum_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_census_simple_request_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_disappearing_server_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_inflight_calls_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_early_server_shutdown_finishes_tags_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_graceful_server_shutdown_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_invoke_large_request_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_max_concurrent_streams_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_no_op_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_ping_pong_streaming_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_binary_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_payload_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_response_with_trailing_metadata_and_payload_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_large_metadata_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_request_with_payload_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_delayed_request_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_simple_request_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_thread_stress_legacy_test bins/$(CONFIG)/chttp2_socket_pair_one_byte_at_a_time_writes_done_hangs_with_pending_read_legacy_test
 
-buildtests_cxx: privatelibs_cxx bins/$(CONFIG)/async_end2end_test bins/$(CONFIG)/channel_arguments_test bins/$(CONFIG)/credentials_test bins/$(CONFIG)/end2end_test bins/$(CONFIG)/interop_client bins/$(CONFIG)/interop_server bins/$(CONFIG)/qps_client bins/$(CONFIG)/qps_server bins/$(CONFIG)/status_test bins/$(CONFIG)/thread_pool_test bins/$(CONFIG)/tips_client bins/$(CONFIG)/tips_publisher_test bins/$(CONFIG)/tips_subscriber_test
+buildtests_cxx: privatelibs_cxx bins/$(CONFIG)/async_end2end_test bins/$(CONFIG)/channel_arguments_test bins/$(CONFIG)/credentials_test bins/$(CONFIG)/end2end_test bins/$(CONFIG)/interop_client bins/$(CONFIG)/interop_server bins/$(CONFIG)/qps_client bins/$(CONFIG)/qps_server bins/$(CONFIG)/status_test bins/$(CONFIG)/thread_pool_test bins/$(CONFIG)/pubsub_client bins/$(CONFIG)/pubsub_publisher_test bins/$(CONFIG)/pubsub_subscriber_test
 
 test: test_c test_cxx
 
@@ -1537,10 +1549,10 @@ test_cxx: buildtests_cxx
 	$(Q) ./bins/$(CONFIG)/status_test || ( echo test status_test failed ; exit 1 )
 	$(E) "[RUN]     Testing thread_pool_test"
 	$(Q) ./bins/$(CONFIG)/thread_pool_test || ( echo test thread_pool_test failed ; exit 1 )
-	$(E) "[RUN]     Testing tips_publisher_test"
-	$(Q) ./bins/$(CONFIG)/tips_publisher_test || ( echo test tips_publisher_test failed ; exit 1 )
-	$(E) "[RUN]     Testing tips_subscriber_test"
-	$(Q) ./bins/$(CONFIG)/tips_subscriber_test || ( echo test tips_subscriber_test failed ; exit 1 )
+	$(E) "[RUN]     Testing pubsub_publisher_test"
+	$(Q) ./bins/$(CONFIG)/pubsub_publisher_test || ( echo test pubsub_publisher_test failed ; exit 1 )
+	$(E) "[RUN]     Testing pubsub_subscriber_test"
+	$(Q) ./bins/$(CONFIG)/pubsub_subscriber_test || ( echo test pubsub_subscriber_test failed ; exit 1 )
 
 
 tools: privatelibs bins/$(CONFIG)/gen_hpack_tables bins/$(CONFIG)/grpc_fetch_oauth2
@@ -1597,27 +1609,27 @@ ifeq ($(CONFIG),opt)
 endif
 
 ifeq ($(NO_PROTOC),true)
-gens/examples/tips/empty.pb.cc: protoc_dep_error
+gens/examples/pubsub/empty.pb.cc: protoc_dep_error
 else
-gens/examples/tips/empty.pb.cc: examples/tips/empty.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+gens/examples/pubsub/empty.pb.cc: examples/pubsub/empty.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --cpp_out=gens --grpc_out=gens --plugin=protoc-gen-grpc=bins/$(CONFIG)/cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
-gens/examples/tips/label.pb.cc: protoc_dep_error
+gens/examples/pubsub/label.pb.cc: protoc_dep_error
 else
-gens/examples/tips/label.pb.cc: examples/tips/label.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+gens/examples/pubsub/label.pb.cc: examples/pubsub/label.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --cpp_out=gens --grpc_out=gens --plugin=protoc-gen-grpc=bins/$(CONFIG)/cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
-gens/examples/tips/pubsub.pb.cc: protoc_dep_error
+gens/examples/pubsub/pubsub.pb.cc: protoc_dep_error
 else
-gens/examples/tips/pubsub.pb.cc: examples/tips/pubsub.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+gens/examples/pubsub/pubsub.pb.cc: examples/pubsub/pubsub.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --cpp_out=gens --grpc_out=gens --plugin=protoc-gen-grpc=bins/$(CONFIG)/cpp_plugin $<
@@ -3008,21 +3020,21 @@ endif
 objs/$(CONFIG)/test/cpp/util/create_test_channel.o:     gens/test/cpp/util/messages.pb.cc    gens/test/cpp/util/echo.pb.cc    gens/test/cpp/util/echo_duplicate.pb.cc
 
 
-LIBTIPS_CLIENT_LIB_SRC = \
-    gens/examples/tips/label.pb.cc \
-    gens/examples/tips/empty.pb.cc \
-    gens/examples/tips/pubsub.pb.cc \
-    examples/tips/publisher.cc \
-    examples/tips/subscriber.cc \
+LIBPUBSUB_CLIENT_LIB_SRC = \
+    gens/examples/pubsub/label.pb.cc \
+    gens/examples/pubsub/empty.pb.cc \
+    gens/examples/pubsub/pubsub.pb.cc \
+    examples/pubsub/publisher.cc \
+    examples/pubsub/subscriber.cc \
 
 
-LIBTIPS_CLIENT_LIB_OBJS = $(addprefix objs/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBTIPS_CLIENT_LIB_SRC))))
+LIBPUBSUB_CLIENT_LIB_OBJS = $(addprefix objs/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBPUBSUB_CLIENT_LIB_SRC))))
 
 ifeq ($(NO_SECURE),true)
 
 # You can't build secure libraries if you don't have OpenSSL with ALPN.
 
-libs/$(CONFIG)/libtips_client_lib.a: openssl_dep_error
+libs/$(CONFIG)/libpubsub_client_lib.a: openssl_dep_error
 
 
 else
@@ -3031,7 +3043,7 @@ ifeq ($(NO_PROTOBUF),true)
 
 # You can't build a C++ library if you don't have protobuf - a bit overreached, but still okay.
 
-libs/$(CONFIG)/libtips_client_lib.a: protobuf_dep_error
+libs/$(CONFIG)/libpubsub_client_lib.a: protobuf_dep_error
 
 
 else
@@ -3040,20 +3052,20 @@ ifneq ($(OPENSSL_DEP),)
 # This is to ensure the embedded OpenSSL is built beforehand, properly
 # installing headers to their final destination on the drive. We need this
 # otherwise parallel compilation will fail if a source is compiled first.
-examples/tips/label.proto: $(OPENSSL_DEP)
-examples/tips/empty.proto: $(OPENSSL_DEP)
-examples/tips/pubsub.proto: $(OPENSSL_DEP)
-examples/tips/publisher.cc: $(OPENSSL_DEP)
-examples/tips/subscriber.cc: $(OPENSSL_DEP)
+examples/pubsub/label.proto: $(OPENSSL_DEP)
+examples/pubsub/empty.proto: $(OPENSSL_DEP)
+examples/pubsub/pubsub.proto: $(OPENSSL_DEP)
+examples/pubsub/publisher.cc: $(OPENSSL_DEP)
+examples/pubsub/subscriber.cc: $(OPENSSL_DEP)
 endif
 
-libs/$(CONFIG)/libtips_client_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTOBUF_DEP) $(LIBTIPS_CLIENT_LIB_OBJS)
+libs/$(CONFIG)/libpubsub_client_lib.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTOBUF_DEP) $(LIBPUBSUB_CLIENT_LIB_OBJS)
 	$(E) "[AR]      Creating $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) rm -f libs/$(CONFIG)/libtips_client_lib.a
-	$(Q) $(AR) rcs libs/$(CONFIG)/libtips_client_lib.a $(LIBTIPS_CLIENT_LIB_OBJS)
+	$(Q) rm -f libs/$(CONFIG)/libpubsub_client_lib.a
+	$(Q) $(AR) rcs libs/$(CONFIG)/libpubsub_client_lib.a $(LIBPUBSUB_CLIENT_LIB_OBJS)
 ifeq ($(SYSTEM),Darwin)
-	$(Q) ranlib libs/$(CONFIG)/libtips_client_lib.a 
+	$(Q) ranlib libs/$(CONFIG)/libpubsub_client_lib.a 
 endif
 
 
@@ -3065,15 +3077,15 @@ endif
 
 ifneq ($(NO_SECURE),true)
 ifneq ($(NO_DEPS),true)
--include $(LIBTIPS_CLIENT_LIB_OBJS:.o=.dep)
+-include $(LIBPUBSUB_CLIENT_LIB_OBJS:.o=.dep)
 endif
 endif
 
 
 
 
-objs/$(CONFIG)/examples/tips/publisher.o:     gens/examples/tips/label.pb.cc    gens/examples/tips/empty.pb.cc    gens/examples/tips/pubsub.pb.cc
-objs/$(CONFIG)/examples/tips/subscriber.o:     gens/examples/tips/label.pb.cc    gens/examples/tips/empty.pb.cc    gens/examples/tips/pubsub.pb.cc
+objs/$(CONFIG)/examples/pubsub/publisher.o:     gens/examples/pubsub/label.pb.cc    gens/examples/pubsub/empty.pb.cc    gens/examples/pubsub/pubsub.pb.cc
+objs/$(CONFIG)/examples/pubsub/subscriber.o:     gens/examples/pubsub/label.pb.cc    gens/examples/pubsub/empty.pb.cc    gens/examples/pubsub/pubsub.pb.cc
 
 
 LIBEND2END_FIXTURE_CHTTP2_FAKE_SECURITY_SRC = \
@@ -7388,95 +7400,95 @@ endif
 endif
 
 
-TIPS_CLIENT_SRC = \
-    examples/tips/main.cc \
+PUBSUB_CLIENT_SRC = \
+    examples/pubsub/main.cc \
 
-TIPS_CLIENT_OBJS = $(addprefix objs/$(CONFIG)/, $(addsuffix .o, $(basename $(TIPS_CLIENT_SRC))))
+PUBSUB_CLIENT_OBJS = $(addprefix objs/$(CONFIG)/, $(addsuffix .o, $(basename $(PUBSUB_CLIENT_SRC))))
 
 ifeq ($(NO_SECURE),true)
 
 # You can't build secure targets if you don't have OpenSSL with ALPN.
 
-bins/$(CONFIG)/tips_client: openssl_dep_error
+bins/$(CONFIG)/pubsub_client: openssl_dep_error
 
 else
 
-bins/$(CONFIG)/tips_client: $(TIPS_CLIENT_OBJS) libs/$(CONFIG)/libtips_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a
+bins/$(CONFIG)/pubsub_client: $(PUBSUB_CLIENT_OBJS) libs/$(CONFIG)/libpubsub_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LDXX) $(LDFLAGS) $(TIPS_CLIENT_OBJS) $(GTEST_LIB) libs/$(CONFIG)/libtips_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) -o bins/$(CONFIG)/tips_client
+	$(Q) $(LDXX) $(LDFLAGS) $(PUBSUB_CLIENT_OBJS) $(GTEST_LIB) libs/$(CONFIG)/libpubsub_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) -o bins/$(CONFIG)/pubsub_client
 
 endif
 
-objs/$(CONFIG)/examples/tips/main.o:  libs/$(CONFIG)/libtips_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a
+objs/$(CONFIG)/examples/pubsub/main.o:  libs/$(CONFIG)/libpubsub_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a
 
-deps_tips_client: $(TIPS_CLIENT_OBJS:.o=.dep)
+deps_pubsub_client: $(PUBSUB_CLIENT_OBJS:.o=.dep)
 
 ifneq ($(NO_SECURE),true)
 ifneq ($(NO_DEPS),true)
--include $(TIPS_CLIENT_OBJS:.o=.dep)
+-include $(PUBSUB_CLIENT_OBJS:.o=.dep)
 endif
 endif
 
 
-TIPS_PUBLISHER_TEST_SRC = \
-    examples/tips/publisher_test.cc \
+PUBSUB_PUBLISHER_TEST_SRC = \
+    examples/pubsub/publisher_test.cc \
 
-TIPS_PUBLISHER_TEST_OBJS = $(addprefix objs/$(CONFIG)/, $(addsuffix .o, $(basename $(TIPS_PUBLISHER_TEST_SRC))))
+PUBSUB_PUBLISHER_TEST_OBJS = $(addprefix objs/$(CONFIG)/, $(addsuffix .o, $(basename $(PUBSUB_PUBLISHER_TEST_SRC))))
 
 ifeq ($(NO_SECURE),true)
 
 # You can't build secure targets if you don't have OpenSSL with ALPN.
 
-bins/$(CONFIG)/tips_publisher_test: openssl_dep_error
+bins/$(CONFIG)/pubsub_publisher_test: openssl_dep_error
 
 else
 
-bins/$(CONFIG)/tips_publisher_test: $(TIPS_PUBLISHER_TEST_OBJS) libs/$(CONFIG)/libtips_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a
+bins/$(CONFIG)/pubsub_publisher_test: $(PUBSUB_PUBLISHER_TEST_OBJS) libs/$(CONFIG)/libpubsub_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LDXX) $(LDFLAGS) $(TIPS_PUBLISHER_TEST_OBJS) $(GTEST_LIB) libs/$(CONFIG)/libtips_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) -o bins/$(CONFIG)/tips_publisher_test
+	$(Q) $(LDXX) $(LDFLAGS) $(PUBSUB_PUBLISHER_TEST_OBJS) $(GTEST_LIB) libs/$(CONFIG)/libpubsub_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) -o bins/$(CONFIG)/pubsub_publisher_test
 
 endif
 
-objs/$(CONFIG)/examples/tips/publisher_test.o:  libs/$(CONFIG)/libtips_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a
+objs/$(CONFIG)/examples/pubsub/publisher_test.o:  libs/$(CONFIG)/libpubsub_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a
 
-deps_tips_publisher_test: $(TIPS_PUBLISHER_TEST_OBJS:.o=.dep)
+deps_pubsub_publisher_test: $(PUBSUB_PUBLISHER_TEST_OBJS:.o=.dep)
 
 ifneq ($(NO_SECURE),true)
 ifneq ($(NO_DEPS),true)
--include $(TIPS_PUBLISHER_TEST_OBJS:.o=.dep)
+-include $(PUBSUB_PUBLISHER_TEST_OBJS:.o=.dep)
 endif
 endif
 
 
-TIPS_SUBSCRIBER_TEST_SRC = \
-    examples/tips/subscriber_test.cc \
+PUBSUB_SUBSCRIBER_TEST_SRC = \
+    examples/pubsub/subscriber_test.cc \
 
-TIPS_SUBSCRIBER_TEST_OBJS = $(addprefix objs/$(CONFIG)/, $(addsuffix .o, $(basename $(TIPS_SUBSCRIBER_TEST_SRC))))
+PUBSUB_SUBSCRIBER_TEST_OBJS = $(addprefix objs/$(CONFIG)/, $(addsuffix .o, $(basename $(PUBSUB_SUBSCRIBER_TEST_SRC))))
 
 ifeq ($(NO_SECURE),true)
 
 # You can't build secure targets if you don't have OpenSSL with ALPN.
 
-bins/$(CONFIG)/tips_subscriber_test: openssl_dep_error
+bins/$(CONFIG)/pubsub_subscriber_test: openssl_dep_error
 
 else
 
-bins/$(CONFIG)/tips_subscriber_test: $(TIPS_SUBSCRIBER_TEST_OBJS) libs/$(CONFIG)/libtips_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a
+bins/$(CONFIG)/pubsub_subscriber_test: $(PUBSUB_SUBSCRIBER_TEST_OBJS) libs/$(CONFIG)/libpubsub_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LDXX) $(LDFLAGS) $(TIPS_SUBSCRIBER_TEST_OBJS) $(GTEST_LIB) libs/$(CONFIG)/libtips_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) -o bins/$(CONFIG)/tips_subscriber_test
+	$(Q) $(LDXX) $(LDFLAGS) $(PUBSUB_SUBSCRIBER_TEST_OBJS) $(GTEST_LIB) libs/$(CONFIG)/libpubsub_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) -o bins/$(CONFIG)/pubsub_subscriber_test
 
 endif
 
-objs/$(CONFIG)/examples/tips/subscriber_test.o:  libs/$(CONFIG)/libtips_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a
+objs/$(CONFIG)/examples/pubsub/subscriber_test.o:  libs/$(CONFIG)/libpubsub_client_lib.a libs/$(CONFIG)/libgrpc++_test_util.a libs/$(CONFIG)/libgrpc_test_util.a libs/$(CONFIG)/libgrpc++.a libs/$(CONFIG)/libgrpc.a libs/$(CONFIG)/libgpr_test_util.a libs/$(CONFIG)/libgpr.a
 
-deps_tips_subscriber_test: $(TIPS_SUBSCRIBER_TEST_OBJS:.o=.dep)
+deps_pubsub_subscriber_test: $(PUBSUB_SUBSCRIBER_TEST_OBJS:.o=.dep)
 
 ifneq ($(NO_SECURE),true)
 ifneq ($(NO_DEPS),true)
--include $(TIPS_SUBSCRIBER_TEST_OBJS:.o=.dep)
+-include $(PUBSUB_SUBSCRIBER_TEST_OBJS:.o=.dep)
 endif
 endif
 
diff --git a/build.json b/build.json
index 53e132a975..60aceeb347 100644
--- a/build.json
+++ b/build.json
@@ -455,15 +455,15 @@
       ]
     },
     {
-      "name": "tips_client_lib",
+      "name": "pubsub_client_lib",
       "build": "private",
       "language": "c++",
       "src": [
-        "examples/tips/label.proto",
-        "examples/tips/empty.proto",
-        "examples/tips/pubsub.proto",
-        "examples/tips/publisher.cc",
-        "examples/tips/subscriber.cc"
+        "examples/pubsub/label.proto",
+        "examples/pubsub/empty.proto",
+        "examples/pubsub/pubsub.proto",
+        "examples/pubsub/publisher.cc",
+        "examples/pubsub/subscriber.cc"
       ],
       "deps": [
         "grpc++",
@@ -1721,15 +1721,15 @@
       ]
     },
     {
-      "name": "tips_client",
+      "name": "pubsub_client",
       "build": "test",
       "run": false,
       "language": "c++",
       "src": [
-        "examples/tips/main.cc"
+        "examples/pubsub/main.cc"
       ],
       "deps": [
-        "tips_client_lib",
+        "pubsub_client_lib",
         "grpc++_test_util",
         "grpc_test_util",
         "grpc++",
@@ -1739,14 +1739,14 @@
       ]
     },
     {
-      "name": "tips_publisher_test",
+      "name": "pubsub_publisher_test",
       "build": "test",
       "language": "c++",
       "src": [
-        "examples/tips/publisher_test.cc"
+        "examples/pubsub/publisher_test.cc"
       ],
       "deps": [
-        "tips_client_lib",
+        "pubsub_client_lib",
         "grpc++_test_util",
         "grpc_test_util",
         "grpc++",
@@ -1756,14 +1756,14 @@
       ]
     },
     {
-      "name": "tips_subscriber_test",
+      "name": "pubsub_subscriber_test",
       "build": "test",
       "language": "c++",
       "src": [
-        "examples/tips/subscriber_test.cc"
+        "examples/pubsub/subscriber_test.cc"
       ],
       "deps": [
-        "tips_client_lib",
+        "pubsub_client_lib",
         "grpc++_test_util",
         "grpc_test_util",
         "grpc++",
diff --git a/examples/tips/README b/examples/pubsub/README
index ae7d096c2e..b55083afc5 100644
--- a/examples/tips/README
+++ b/examples/pubsub/README
@@ -1,4 +1,4 @@
-C++ Client implementation for Cloud Pub/Sub service (TIPS)
+C++ Client implementation for Cloud Pub/Sub service
 (https://developers.google.com/apis-explorer/#p/pubsub/v1beta1/).
 
 "Google Cloud Pub/Sub" API needs to be enabled at
@@ -11,16 +11,20 @@ be created with scope "https://www.googleapis.com/auth/cloud-platform" as below:
 
 gcloud compute instances create instance-name 
     --image debian-7 --scopes https://www.googleapis.com/auth/cloud-platform
+
+Google TLS cert is required to run the client, which can be downloaded from
+Chrome browser.  
    
 To run the client from GCE:
-make tips_client
-bins/opt/tips_client --project_id="your project id"
+make pubsub_client
+GRPC_DEFAULT_SSL_ROOTS_FILE_PATH="Google TLS cert" bins/opt/pubsub_client
+     --project_id="your project id"
     
 A service account credential is required to run the client from other
 environments, which can be generated as a JSON key file from
 https://console.developers.google.com/project/. To run the client with a service 
 account credential:
 
-bins/opt/tips_client
+GRPC_DEFAULT_SSL_ROOTS_FILE_PATH="Google TLS cert" bins/opt/pubsub_client
     --project_id="your project id"
     --service_account_key_file="absolute path to the JSON key file"
diff --git a/examples/tips/empty.proto b/examples/pubsub/empty.proto
index 86aaa846a2..86aaa846a2 100644
--- a/examples/tips/empty.proto
+++ b/examples/pubsub/empty.proto
diff --git a/examples/tips/label.proto b/examples/pubsub/label.proto
index 6ac786f078..6ac786f078 100644
--- a/examples/tips/label.proto
+++ b/examples/pubsub/label.proto
diff --git a/examples/tips/main.cc b/examples/pubsub/main.cc
index df9d984ae1..18c81c426d 100644
--- a/examples/tips/main.cc
+++ b/examples/pubsub/main.cc
@@ -46,8 +46,8 @@
 #include <grpc++/credentials.h>
 #include <grpc++/status.h>
 
-#include "examples/tips/publisher.h"
-#include "examples/tips/subscriber.h"
+#include "examples/pubsub/publisher.h"
+#include "examples/pubsub/subscriber.h"
 #include "test/cpp/util/create_test_channel.h"
 
 DEFINE_int32(server_port, 443, "Server port.");
@@ -82,7 +82,7 @@ grpc::string GetServiceAccountJsonKey() {
 int main(int argc, char** argv) {
   grpc_init();
   google::ParseCommandLineFlags(&argc, &argv, true);
-  gpr_log(GPR_INFO, "Start TIPS client");
+  gpr_log(GPR_INFO, "Start PUBSUB client");
 
   std::ostringstream ss;
 
@@ -104,8 +104,8 @@ int main(int argc, char** argv) {
           true,                // use prod roots
           creds));
 
-  grpc::examples::tips::Publisher publisher(channel);
-  grpc::examples::tips::Subscriber subscriber(channel);
+  grpc::examples::pubsub::Publisher publisher(channel);
+  grpc::examples::pubsub::Subscriber subscriber(channel);
 
   GPR_ASSERT(FLAGS_project_id != "");
   ss.str("");
diff --git a/examples/tips/publisher.cc b/examples/pubsub/publisher.cc
index eae8731139..cdefd08662 100644
--- a/examples/tips/publisher.cc
+++ b/examples/pubsub/publisher.cc
@@ -35,7 +35,7 @@
 
 #include <grpc++/client_context.h>
 
-#include "examples/tips/publisher.h"
+#include "examples/pubsub/publisher.h"
 
 using tech::pubsub::Topic;
 using tech::pubsub::DeleteTopicRequest;
@@ -48,7 +48,7 @@ using tech::pubsub::PubsubMessage;
 
 namespace grpc {
 namespace examples {
-namespace tips {
+namespace pubsub {
 
 Publisher::Publisher(std::shared_ptr<ChannelInterface> channel)
     : stub_(PublisherService::NewStub(channel)) {
@@ -119,6 +119,6 @@ Status Publisher::Publish(const grpc::string& topic, const grpc::string& data) {
   return stub_->Publish(&context, request, &response);
 }
 
-}  // namespace tips
+}  // namespace pubsub
 }  // namespace examples
 }  // namespace grpc
diff --git a/examples/tips/publisher.h b/examples/pubsub/publisher.h
index d8d7353826..8eb666aea5 100644
--- a/examples/tips/publisher.h
+++ b/examples/pubsub/publisher.h
@@ -31,17 +31,17 @@
  *
  */
 
-#ifndef __GRPCPP_EXAMPLES_TIPS_PUBLISHER_H_
-#define __GRPCPP_EXAMPLES_TIPS_PUBLISHER_H_
+#ifndef __GRPCPP_EXAMPLES_PUBSUB_PUBLISHER_H_
+#define __GRPCPP_EXAMPLES_PUBSUB_PUBLISHER_H_
 
 #include <grpc++/channel_interface.h>
 #include <grpc++/status.h>
 
-#include "examples/tips/pubsub.pb.h"
+#include "examples/pubsub/pubsub.pb.h"
 
 namespace grpc {
 namespace examples {
-namespace tips {
+namespace pubsub {
 
 class Publisher {
  public:
@@ -60,8 +60,8 @@ class Publisher {
   std::unique_ptr<tech::pubsub::PublisherService::Stub> stub_;
 };
 
-}  // namespace tips
+}  // namespace pubsub
 }  // namespace examples
 }  // namespace grpc
 
-#endif  // __GRPCPP_EXAMPLES_TIPS_PUBLISHER_H_
+#endif  // __GRPCPP_EXAMPLES_PUBSUB_PUBLISHER_H_
diff --git a/examples/tips/publisher_test.cc b/examples/pubsub/publisher_test.cc
index db3e3784da..6f4bc6ba70 100644
--- a/examples/tips/publisher_test.cc
+++ b/examples/pubsub/publisher_test.cc
@@ -43,7 +43,7 @@
 #include <grpc++/status.h>
 #include <gtest/gtest.h>
 
-#include "examples/tips/publisher.h"
+#include "examples/pubsub/publisher.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 
@@ -112,7 +112,7 @@ class PublisherTest : public ::testing::Test {
 
     channel_ = CreateChannel(server_address_.str(), ChannelArguments());
 
-    publisher_.reset(new grpc::examples::tips::Publisher(channel_));
+    publisher_.reset(new grpc::examples::pubsub::Publisher(channel_));
   }
 
   void TearDown() override {
@@ -126,7 +126,7 @@ class PublisherTest : public ::testing::Test {
 
   std::shared_ptr<ChannelInterface> channel_;
 
-  std::unique_ptr<grpc::examples::tips::Publisher> publisher_;
+  std::unique_ptr<grpc::examples::pubsub::Publisher> publisher_;
 };
 
 TEST_F(PublisherTest, TestPublisher) {
diff --git a/examples/tips/pubsub.proto b/examples/pubsub/pubsub.proto
index a2dd2f5ca8..c330f0cdac 100644
--- a/examples/tips/pubsub.proto
+++ b/examples/pubsub/pubsub.proto
@@ -4,8 +4,8 @@
 
 syntax = "proto2";
 
-import "examples/tips/empty.proto";
-import "examples/tips/label.proto";
+import "examples/pubsub/empty.proto";
+import "examples/pubsub/label.proto";
 
 package tech.pubsub;
 
diff --git a/examples/tips/subscriber.cc b/examples/pubsub/subscriber.cc
index c0673223ae..18ce0721f6 100644
--- a/examples/tips/subscriber.cc
+++ b/examples/pubsub/subscriber.cc
@@ -33,7 +33,7 @@
 
 #include <grpc++/client_context.h>
 
-#include "examples/tips/subscriber.h"
+#include "examples/pubsub/subscriber.h"
 
 using tech::pubsub::Topic;
 using tech::pubsub::DeleteTopicRequest;
@@ -46,7 +46,7 @@ using tech::pubsub::PubsubMessage;
 
 namespace grpc {
 namespace examples {
-namespace tips {
+namespace pubsub {
 
 Subscriber::Subscriber(std::shared_ptr<ChannelInterface> channel)
     : stub_(SubscriberService::NewStub(channel)) {
@@ -113,6 +113,6 @@ Status Subscriber::Pull(const grpc::string& name, grpc::string* data) {
   return s;
 }
 
-}  // namespace tips
+}  // namespace pubsub
 }  // namespace examples
 }  // namespace grpc
diff --git a/examples/tips/subscriber.h b/examples/pubsub/subscriber.h
index ed706ff170..e5f036f89f 100644
--- a/examples/tips/subscriber.h
+++ b/examples/pubsub/subscriber.h
@@ -31,17 +31,17 @@
  *
  */
 
-#ifndef __GRPCPP_EXAMPLES_TIPS_SUBSCRIBER_H_
-#define __GRPCPP_EXAMPLES_TIPS_SUBSCRIBER_H_
+#ifndef __GRPCPP_EXAMPLES_PUBSUB_SUBSCRIBER_H_
+#define __GRPCPP_EXAMPLES_PUBSUB_SUBSCRIBER_H_
 
 #include <grpc++/channel_interface.h>
 #include <grpc++/status.h>
 
-#include "examples/tips/pubsub.pb.h"
+#include "examples/pubsub/pubsub.pb.h"
 
 namespace grpc {
 namespace examples {
-namespace tips {
+namespace pubsub {
 
 class Subscriber {
  public:
@@ -61,8 +61,8 @@ class Subscriber {
   std::unique_ptr<tech::pubsub::SubscriberService::Stub> stub_;
 };
 
-}  // namespace tips
+}  // namespace pubsub
 }  // namespace examples
 }  // namespace grpc
 
-#endif  // __GRPCPP_EXAMPLES_TIPS_SUBSCRIBER_H_
+#endif  // __GRPCPP_EXAMPLES_PUBSUB_SUBSCRIBER_H_
diff --git a/examples/tips/subscriber_test.cc b/examples/pubsub/subscriber_test.cc
index 736e6da319..a436c5d4e2 100644
--- a/examples/tips/subscriber_test.cc
+++ b/examples/pubsub/subscriber_test.cc
@@ -43,7 +43,7 @@
 #include <grpc++/status.h>
 #include <gtest/gtest.h>
 
-#include "examples/tips/subscriber.h"
+#include "examples/pubsub/subscriber.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 
@@ -111,7 +111,7 @@ class SubscriberTest : public ::testing::Test {
 
     channel_ = CreateChannel(server_address_.str(), ChannelArguments());
 
-    subscriber_.reset(new grpc::examples::tips::Subscriber(channel_));
+    subscriber_.reset(new grpc::examples::pubsub::Subscriber(channel_));
   }
 
   void TearDown() override {
@@ -125,7 +125,7 @@ class SubscriberTest : public ::testing::Test {
 
   std::shared_ptr<ChannelInterface> channel_;
 
-  std::unique_ptr<grpc::examples::tips::Subscriber> subscriber_;
+  std::unique_ptr<grpc::examples::pubsub::Subscriber> subscriber_;
 };
 
 TEST_F(SubscriberTest, TestSubscriber) {
diff --git a/src/csharp/GrpcApi/MathExamples.cs b/src/csharp/GrpcApi/MathExamples.cs
index 43f0cedef6..07bcc9c9cd 100644
--- a/src/csharp/GrpcApi/MathExamples.cs
+++ b/src/csharp/GrpcApi/MathExamples.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Threading.Tasks;
 using System.Collections.Generic;
diff --git a/src/csharp/GrpcApi/MathGrpc.cs b/src/csharp/GrpcApi/MathGrpc.cs
index 520fec437a..606e7f0239 100644
--- a/src/csharp/GrpcApi/MathGrpc.cs
+++ b/src/csharp/GrpcApi/MathGrpc.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Threading;
 using System.Threading.Tasks;
diff --git a/src/csharp/GrpcApi/MathServiceImpl.cs b/src/csharp/GrpcApi/MathServiceImpl.cs
index 27abc4ce17..ffd794d6c6 100644
--- a/src/csharp/GrpcApi/MathServiceImpl.cs
+++ b/src/csharp/GrpcApi/MathServiceImpl.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Threading;
 using System.Threading.Tasks;
diff --git a/src/csharp/GrpcApiTests/MathClientServerTests.cs b/src/csharp/GrpcApiTests/MathClientServerTests.cs
index aa78b698e8..bb3f75d4ac 100644
--- a/src/csharp/GrpcApiTests/MathClientServerTests.cs
+++ b/src/csharp/GrpcApiTests/MathClientServerTests.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using NUnit.Framework;
 using Google.GRPC.Core;
@@ -13,7 +46,7 @@ namespace math.Tests
     /// </summary>
     public class MathClientServerTest
     {
-        string serverAddr = "localhost:" + PortPicker.PickUnusedPort();
+        string host = "localhost";
         Server server;
         Channel channel;
         MathGrpc.IMathServiceClient client;
@@ -21,11 +54,13 @@ namespace math.Tests
         [TestFixtureSetUp]
         public void Init()
         {
+            GrpcEnvironment.Initialize();
+
             server = new Server();
             server.AddServiceDefinition(MathGrpc.BindService(new MathServiceImpl()));
-            server.AddPort(serverAddr);
+            int port = server.AddPort(host + ":0");
             server.Start();
-            channel = new Channel(serverAddr);
+            channel = new Channel(host + ":" + port);
             client = MathGrpc.NewStub(channel);
         }
 
diff --git a/src/csharp/GrpcCore/Call.cs b/src/csharp/GrpcCore/Call.cs
index 66e7004180..181210902f 100644
--- a/src/csharp/GrpcCore/Call.cs
+++ b/src/csharp/GrpcCore/Call.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using Google.GRPC.Core.Internal;
 
diff --git a/src/csharp/GrpcCore/Calls.cs b/src/csharp/GrpcCore/Calls.cs
index c3e51cb478..101965600e 100644
--- a/src/csharp/GrpcCore/Calls.cs
+++ b/src/csharp/GrpcCore/Calls.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Threading;
 using System.Threading.Tasks;
diff --git a/src/csharp/GrpcCore/Channel.cs b/src/csharp/GrpcCore/Channel.cs
index b0d8beeb7b..cd4f151f49 100644
--- a/src/csharp/GrpcCore/Channel.cs
+++ b/src/csharp/GrpcCore/Channel.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 using System.Threading;
@@ -8,13 +41,6 @@ namespace Google.GRPC.Core
 {
 	public class Channel : IDisposable
 	{
-        /// <summary>
-        /// Make sure GPRC environment is initialized before any channels get used.
-        /// </summary>
-        static Channel() {
-            GrpcEnvironment.EnsureInitialized();
-        }
-       
         readonly ChannelSafeHandle handle;
         readonly String target;
 
diff --git a/src/csharp/GrpcCore/ClientStreamingAsyncResult.cs b/src/csharp/GrpcCore/ClientStreamingAsyncResult.cs
index 9e7312c1fa..507d0dd8ad 100644
--- a/src/csharp/GrpcCore/ClientStreamingAsyncResult.cs
+++ b/src/csharp/GrpcCore/ClientStreamingAsyncResult.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Threading.Tasks;
 
diff --git a/src/csharp/GrpcCore/GrpcCore.csproj b/src/csharp/GrpcCore/GrpcCore.csproj
index 95df890917..34b9f6dfb8 100644
--- a/src/csharp/GrpcCore/GrpcCore.csproj
+++ b/src/csharp/GrpcCore/GrpcCore.csproj
@@ -61,7 +61,6 @@
     <Compile Include="Marshaller.cs" />
     <Compile Include="ServerServiceDefinition.cs" />
     <Compile Include="Utils\RecordingObserver.cs" />
-    <Compile Include="Utils\PortPicker.cs" />
     <Compile Include="Utils\RecordingQueue.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
diff --git a/src/csharp/GrpcCore/GrpcEnvironment.cs b/src/csharp/GrpcCore/GrpcEnvironment.cs
index 7a7ff39179..ee1168621d 100644
--- a/src/csharp/GrpcCore/GrpcEnvironment.cs
+++ b/src/csharp/GrpcCore/GrpcEnvironment.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using Google.GRPC.Core.Internal;
 using System.Runtime.InteropServices;
@@ -5,11 +38,9 @@ using System.Runtime.InteropServices;
 namespace Google.GRPC.Core
 {
     /// <summary>
-    /// Encapsulates initialization and shutdown of GRPC C core library.
-    /// You should not need to initialize it manually, as static constructors
-    /// should load the library when needed.
+    /// Encapsulates initialization and shutdown of gRPC library.
     /// </summary>
-    public static class GrpcEnvironment
+    public class GrpcEnvironment
     {
         const int THREAD_POOL_SIZE = 1;
 
@@ -20,21 +51,24 @@ namespace Google.GRPC.Core
         static extern void grpcsharp_shutdown();
 
         static object staticLock = new object();
-        static bool initCalled = false;
-        static bool shutdownCalled = false;
-
-        static GrpcThreadPool threadPool = new GrpcThreadPool(THREAD_POOL_SIZE);
+        static volatile GrpcEnvironment instance;
+       
+        readonly GrpcThreadPool threadPool;
+        bool isClosed;
 
         /// <summary>
-        /// Makes sure GRPC environment is initialized.
+        /// Makes sure GRPC environment is initialized. Subsequent invocations don't have any
+        /// effect unless you call Shutdown first.
+        /// Although normal use cases assume you will call this just once in your application's
+        /// lifetime (and call Shutdown once you're done), for the sake of easier testing it's 
+        /// allowed to initialize the environment again after it has been successfully shutdown.
         /// </summary>
-        public static void EnsureInitialized() {
+        public static void Initialize() {
             lock(staticLock)
             {
-                if (!initCalled)
+                if (instance == null)
                 {
-                    initCalled = true;
-                    GrpcInit();       
+                    instance = new GrpcEnvironment();
                 }
             }
         }
@@ -47,45 +81,55 @@ namespace Google.GRPC.Core
         {
             lock(staticLock)
             {
-                if (initCalled && !shutdownCalled)
+                if (instance != null)
                 {
-                    shutdownCalled = true;
-                    GrpcShutdown();
+                    instance.Close();
+                    instance = null;
                 }
             }
+        }
 
+        internal static GrpcThreadPool ThreadPool
+        {
+            get
+            {
+                var inst = instance;
+                if (inst == null)
+                {
+                    throw new InvalidOperationException("GRPC environment not initialized");
+                }
+                return inst.threadPool;
+            }
         }
 
         /// <summary>
-        /// Initializes GRPC C Core library.
+        /// Creates gRPC environment.
         /// </summary>
-        private static void GrpcInit()
+        private GrpcEnvironment()
         {
             grpcsharp_init();
+            threadPool = new GrpcThreadPool(THREAD_POOL_SIZE);
             threadPool.Start();
             // TODO: use proper logging here
             Console.WriteLine("GRPC initialized.");
         }
 
         /// <summary>
-        /// Shutdown GRPC C Core library.
+        /// Shuts down this environment.
         /// </summary>
-        private static void GrpcShutdown()
+        private void Close()
         {
+            if (isClosed)
+            {
+                throw new InvalidOperationException("Close has already been called");
+            }
             threadPool.Stop();
             grpcsharp_shutdown();
+            isClosed = true;
 
             // TODO: use proper logging here
             Console.WriteLine("GRPC shutdown.");
         }
-
-        internal static GrpcThreadPool ThreadPool
-        {
-            get
-            {
-                return threadPool;
-            }
-        }
     }
 }
 
diff --git a/src/csharp/GrpcCore/Internal/AsyncCall.cs b/src/csharp/GrpcCore/Internal/AsyncCall.cs
index c38363bb2b..a3b40e512c 100644
--- a/src/csharp/GrpcCore/Internal/AsyncCall.cs
+++ b/src/csharp/GrpcCore/Internal/AsyncCall.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 using System.Diagnostics;
diff --git a/src/csharp/GrpcCore/Internal/CallSafeHandle.cs b/src/csharp/GrpcCore/Internal/CallSafeHandle.cs
index f5973e2709..d91d2ac6cb 100644
--- a/src/csharp/GrpcCore/Internal/CallSafeHandle.cs
+++ b/src/csharp/GrpcCore/Internal/CallSafeHandle.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 using System.Diagnostics;
diff --git a/src/csharp/GrpcCore/Internal/ChannelSafeHandle.cs b/src/csharp/GrpcCore/Internal/ChannelSafeHandle.cs
index 6436f2bb31..f6af64c967 100644
--- a/src/csharp/GrpcCore/Internal/ChannelSafeHandle.cs
+++ b/src/csharp/GrpcCore/Internal/ChannelSafeHandle.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 using System.Threading;
diff --git a/src/csharp/GrpcCore/Internal/CompletionQueueSafeHandle.cs b/src/csharp/GrpcCore/Internal/CompletionQueueSafeHandle.cs
index 77d8bde375..fc2b1d5421 100644
--- a/src/csharp/GrpcCore/Internal/CompletionQueueSafeHandle.cs
+++ b/src/csharp/GrpcCore/Internal/CompletionQueueSafeHandle.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 using System.Threading.Tasks;
diff --git a/src/csharp/GrpcCore/Internal/Enums.cs b/src/csharp/GrpcCore/Internal/Enums.cs
index 1151e94899..c2eb1327b3 100644
--- a/src/csharp/GrpcCore/Internal/Enums.cs
+++ b/src/csharp/GrpcCore/Internal/Enums.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 
diff --git a/src/csharp/GrpcCore/Internal/Event.cs b/src/csharp/GrpcCore/Internal/Event.cs
index cefe8cfbb2..9229472ccd 100644
--- a/src/csharp/GrpcCore/Internal/Event.cs
+++ b/src/csharp/GrpcCore/Internal/Event.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 using Google.GRPC.Core;
diff --git a/src/csharp/GrpcCore/Internal/GrpcThreadPool.cs b/src/csharp/GrpcCore/Internal/GrpcThreadPool.cs
index 1139e54a1d..b768decc8c 100644
--- a/src/csharp/GrpcCore/Internal/GrpcThreadPool.cs
+++ b/src/csharp/GrpcCore/Internal/GrpcThreadPool.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using Google.GRPC.Core.Internal;
 using System.Runtime.InteropServices;
diff --git a/src/csharp/GrpcCore/Internal/SafeHandleZeroIsInvalid.cs b/src/csharp/GrpcCore/Internal/SafeHandleZeroIsInvalid.cs
index 5a1252b881..c7d8a0a3c3 100644
--- a/src/csharp/GrpcCore/Internal/SafeHandleZeroIsInvalid.cs
+++ b/src/csharp/GrpcCore/Internal/SafeHandleZeroIsInvalid.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 
diff --git a/src/csharp/GrpcCore/Internal/ServerSafeHandle.cs b/src/csharp/GrpcCore/Internal/ServerSafeHandle.cs
index 391a1acd01..2ae0ad237d 100644
--- a/src/csharp/GrpcCore/Internal/ServerSafeHandle.cs
+++ b/src/csharp/GrpcCore/Internal/ServerSafeHandle.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 using System.Diagnostics;
diff --git a/src/csharp/GrpcCore/Internal/ServerWritingObserver.cs b/src/csharp/GrpcCore/Internal/ServerWritingObserver.cs
index 2b46e9c53d..1120791842 100644
--- a/src/csharp/GrpcCore/Internal/ServerWritingObserver.cs
+++ b/src/csharp/GrpcCore/Internal/ServerWritingObserver.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using Google.GRPC.Core.Internal;
 
diff --git a/src/csharp/GrpcCore/Internal/StreamingInputObserver.cs b/src/csharp/GrpcCore/Internal/StreamingInputObserver.cs
index c5de979351..49410961cb 100644
--- a/src/csharp/GrpcCore/Internal/StreamingInputObserver.cs
+++ b/src/csharp/GrpcCore/Internal/StreamingInputObserver.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using Google.GRPC.Core.Internal;
 
diff --git a/src/csharp/GrpcCore/Internal/Timespec.cs b/src/csharp/GrpcCore/Internal/Timespec.cs
index c45926707f..651003dae8 100644
--- a/src/csharp/GrpcCore/Internal/Timespec.cs
+++ b/src/csharp/GrpcCore/Internal/Timespec.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 using System.Threading;
diff --git a/src/csharp/GrpcCore/Marshaller.cs b/src/csharp/GrpcCore/Marshaller.cs
index 242524063c..21bd26650b 100644
--- a/src/csharp/GrpcCore/Marshaller.cs
+++ b/src/csharp/GrpcCore/Marshaller.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 
 namespace Google.GRPC.Core
diff --git a/src/csharp/GrpcCore/Method.cs b/src/csharp/GrpcCore/Method.cs
index 9067ae8c94..a8c647035d 100644
--- a/src/csharp/GrpcCore/Method.cs
+++ b/src/csharp/GrpcCore/Method.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 
 namespace Google.GRPC.Core
diff --git a/src/csharp/GrpcCore/RpcException.cs b/src/csharp/GrpcCore/RpcException.cs
index 8811c3a7c7..5d1ca3bcdf 100644
--- a/src/csharp/GrpcCore/RpcException.cs
+++ b/src/csharp/GrpcCore/RpcException.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 
 namespace Google.GRPC.Core
diff --git a/src/csharp/GrpcCore/Server.cs b/src/csharp/GrpcCore/Server.cs
index d3bc81e574..62ffa70b71 100644
--- a/src/csharp/GrpcCore/Server.cs
+++ b/src/csharp/GrpcCore/Server.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 using System.Diagnostics;
@@ -26,10 +59,6 @@ namespace Google.GRPC.Core
 
         readonly TaskCompletionSource<object> shutdownTcs = new TaskCompletionSource<object>();
 
-        static Server() {
-            GrpcEnvironment.EnsureInitialized();
-        }
-
         public Server()
         {
             // TODO: what is the tag for server shutdown?
diff --git a/src/csharp/GrpcCore/ServerCallHandler.cs b/src/csharp/GrpcCore/ServerCallHandler.cs
index 67103791b4..12d0c93634 100644
--- a/src/csharp/GrpcCore/ServerCallHandler.cs
+++ b/src/csharp/GrpcCore/ServerCallHandler.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using Google.GRPC.Core.Internal;
 
diff --git a/src/csharp/GrpcCore/ServerCalls.cs b/src/csharp/GrpcCore/ServerCalls.cs
index 86c4718932..b95a0d97b4 100644
--- a/src/csharp/GrpcCore/ServerCalls.cs
+++ b/src/csharp/GrpcCore/ServerCalls.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 
 namespace Google.GRPC.Core
diff --git a/src/csharp/GrpcCore/ServerServiceDefinition.cs b/src/csharp/GrpcCore/ServerServiceDefinition.cs
index 7f1cc6284e..f0b4daf071 100644
--- a/src/csharp/GrpcCore/ServerServiceDefinition.cs
+++ b/src/csharp/GrpcCore/ServerServiceDefinition.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Collections.Generic;
 
diff --git a/src/csharp/GrpcCore/Status.cs b/src/csharp/GrpcCore/Status.cs
index f1212f8d67..dce1e24d7e 100644
--- a/src/csharp/GrpcCore/Status.cs
+++ b/src/csharp/GrpcCore/Status.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 
diff --git a/src/csharp/GrpcCore/StatusCode.cs b/src/csharp/GrpcCore/StatusCode.cs
index 80fc8bd581..eccaae72f6 100644
--- a/src/csharp/GrpcCore/StatusCode.cs
+++ b/src/csharp/GrpcCore/StatusCode.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 
 namespace Google.GRPC.Core
diff --git a/src/csharp/GrpcCore/Utils/PortPicker.cs b/src/csharp/GrpcCore/Utils/PortPicker.cs
deleted file mode 100644
index 7c83bf3886..0000000000
--- a/src/csharp/GrpcCore/Utils/PortPicker.cs
+++ /dev/null
@@ -1,50 +0,0 @@
-using System;
-using System.Net;
-using System.Net.Sockets;
-
-namespace Google.GRPC.Core.Utils
-{
-    public class PortPicker
-    {
-        static Random random = new Random();
-
-        // TODO: cleanup this code a bit
-        public static int PickUnusedPort()
-        {
-            int port;
-            do
-            {
-                port = random.Next(2000, 50000);
-
-            } while(!IsPortAvailable(port));
-            return port;
-        }
-
-        // TODO: cleanup this code a bit
-        public static bool IsPortAvailable(int port)
-        {
-            bool available = true;
-
-            TcpListener server = null;
-            try
-            {
-                IPAddress ipAddress = Dns.GetHostEntry("localhost").AddressList[0];
-                server = new TcpListener(ipAddress, port);
-                server.Start();
-            }
-            catch (Exception ex)
-            {
-                available = false;
-            }
-            finally
-            {
-                if (server != null)
-                {
-                    server.Stop();
-                }
-            }
-            return available;
-        }
-    }
-}
-
diff --git a/src/csharp/GrpcCore/Utils/RecordingObserver.cs b/src/csharp/GrpcCore/Utils/RecordingObserver.cs
index ca11cc4aa2..0cadfc0e4a 100644
--- a/src/csharp/GrpcCore/Utils/RecordingObserver.cs
+++ b/src/csharp/GrpcCore/Utils/RecordingObserver.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Threading.Tasks;
 using System.Collections.Generic;
diff --git a/src/csharp/GrpcCore/Utils/RecordingQueue.cs b/src/csharp/GrpcCore/Utils/RecordingQueue.cs
index 0726f00af7..d73fc0fc78 100644
--- a/src/csharp/GrpcCore/Utils/RecordingQueue.cs
+++ b/src/csharp/GrpcCore/Utils/RecordingQueue.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Threading.Tasks;
 using System.Collections.Generic;
@@ -5,6 +38,7 @@ using System.Collections.Concurrent;
 
 namespace Google.GRPC.Core.Utils
 {
+    // TODO: replace this by something that implements IAsyncEnumerator.
     /// <summary>
     /// Observer that allows us to await incoming messages one-by-one.
     /// The implementation is not ideal and class will be probably replaced 
diff --git a/src/csharp/GrpcCoreTests/ClientServerTest.cs b/src/csharp/GrpcCoreTests/ClientServerTest.cs
index c700ffbe7b..1472db6e07 100644
--- a/src/csharp/GrpcCoreTests/ClientServerTest.cs
+++ b/src/csharp/GrpcCoreTests/ClientServerTest.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using NUnit.Framework;
 using Google.GRPC.Core;
@@ -10,7 +43,7 @@ namespace Google.GRPC.Core.Tests
 {
     public class ClientServerTest
     {
-        string serverAddr = "localhost:" + PortPicker.PickUnusedPort();
+        string host = "localhost";
 
         Method<string, string> unaryEchoStringMethod = new Method<string, string>(
             MethodType.Unary,
@@ -21,15 +54,17 @@ namespace Google.GRPC.Core.Tests
         [Test]
         public void EmptyCall()
         {
+            GrpcEnvironment.Initialize();
+
             Server server = new Server();
             server.AddServiceDefinition(
                 ServerServiceDefinition.CreateBuilder("someService")
                     .AddMethod(unaryEchoStringMethod, HandleUnaryEchoString).Build());
 
-            server.AddPort(serverAddr);
+            int port = server.AddPort(host + ":0");
             server.Start();
 
-            using (Channel channel = new Channel(serverAddr))
+            using (Channel channel = new Channel(host + ":" + port))
             {
                 var call = new Call<string, string>(unaryEchoStringMethod, channel);
 
diff --git a/src/csharp/GrpcCoreTests/GrpcEnvironmentTest.cs b/src/csharp/GrpcCoreTests/GrpcEnvironmentTest.cs
index 136878d76e..1bc6cce401 100644
--- a/src/csharp/GrpcCoreTests/GrpcEnvironmentTest.cs
+++ b/src/csharp/GrpcCoreTests/GrpcEnvironmentTest.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using NUnit.Framework;
 using Google.GRPC.Core;
@@ -9,10 +42,30 @@ namespace Google.GRPC.Core.Tests
     {
         [Test]
         public void InitializeAndShutdownGrpcEnvironment() {
-            GrpcEnvironment.EnsureInitialized();
-            Thread.Sleep(500);
+            GrpcEnvironment.Initialize();
             Assert.IsNotNull(GrpcEnvironment.ThreadPool.CompletionQueue);
             GrpcEnvironment.Shutdown();
         }
+
+        [Test]
+        public void SubsequentInvocations() {
+            GrpcEnvironment.Initialize();
+            GrpcEnvironment.Initialize();
+            GrpcEnvironment.Shutdown();
+            GrpcEnvironment.Shutdown();
+        }
+
+        [Test]
+        public void InitializeAfterShutdown() {
+            GrpcEnvironment.Initialize();
+            var tp1 = GrpcEnvironment.ThreadPool;
+            GrpcEnvironment.Shutdown();
+
+            GrpcEnvironment.Initialize();
+            var tp2 = GrpcEnvironment.ThreadPool;
+            GrpcEnvironment.Shutdown();
+
+            Assert.IsFalse(Object.ReferenceEquals(tp1, tp2));
+        }
     }
 }
diff --git a/src/csharp/GrpcCoreTests/ServerTest.cs b/src/csharp/GrpcCoreTests/ServerTest.cs
index 6e13bc735f..1c70a3d6c4 100644
--- a/src/csharp/GrpcCoreTests/ServerTest.cs
+++ b/src/csharp/GrpcCoreTests/ServerTest.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using NUnit.Framework;
 using Google.GRPC.Core.Internal;
@@ -9,10 +42,12 @@ namespace Google.GRPC.Core.Tests
     public class ServerTest
     {
         [Test]
-        public void StartAndShutdownServer() {
+        public void StartAndShutdownServer()
+        {
+            GrpcEnvironment.Initialize();
 
             Server server = new Server();
-            server.AddPort("localhost:" + PortPicker.PickUnusedPort());
+            int port = server.AddPort("localhost:0");
             server.Start();
             server.ShutdownAsync().Wait();
 
diff --git a/src/csharp/GrpcCoreTests/TimespecTest.cs b/src/csharp/GrpcCoreTests/TimespecTest.cs
index cab59fa5b3..2b03513cb7 100644
--- a/src/csharp/GrpcCoreTests/TimespecTest.cs
+++ b/src/csharp/GrpcCoreTests/TimespecTest.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using NUnit.Framework;
 using System.Runtime.InteropServices;
diff --git a/src/csharp/InteropClient/Client.cs b/src/csharp/InteropClient/Client.cs
index 9f5815050e..fcc6a572e4 100644
--- a/src/csharp/InteropClient/Client.cs
+++ b/src/csharp/InteropClient/Client.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Collections.Generic;
 using NUnit.Framework;
@@ -60,6 +93,8 @@ namespace Google.GRPC.Interop
 
         private void Run()
         {
+            GrpcEnvironment.Initialize();
+
             string addr = string.Format("{0}:{1}", options.serverHost, options.serverPort);
             using (Channel channel = new Channel(addr))
             {
diff --git a/src/csharp/MathClient/MathClient.cs b/src/csharp/MathClient/MathClient.cs
index 45222abb79..a54c8e3809 100644
--- a/src/csharp/MathClient/MathClient.cs
+++ b/src/csharp/MathClient/MathClient.cs
@@ -1,3 +1,36 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// 
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
 using System;
 using System.Runtime.InteropServices;
 using Google.GRPC.Core;
@@ -9,6 +42,8 @@ namespace math
     {
 		public static void Main (string[] args)
 		{
+            GrpcEnvironment.Initialize();
+
 			using (Channel channel = new Channel("127.0.0.1:23456"))
 			{
 				MathGrpc.IMathServiceClient stub = new MathGrpc.MathServiceClientStub(channel);
diff --git a/src/csharp/ext/grpc_csharp_ext.c b/src/csharp/ext/grpc_csharp_ext.c
index 2c4cdfa0b6..c7949af44e 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -1,3 +1,36 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
 #include <grpc/support/port_platform.h>
 #include <grpc/grpc.h>
 #include <grpc/support/log.h>
diff --git a/templates/Makefile.template b/templates/Makefile.template
index c5e6d0afaf..b9ae217054 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -92,6 +92,18 @@ OPENSSL_CONFIG_msan = no-asm
 LDFLAGS_msan = -fsanitize=memory
 DEFINES_msan = NDEBUG
 
+VALID_CONFIG_ubsan = 1
+REQUIRE_CUSTOM_LIBRARIES_ubsan = 1
+CC_ubsan = clang
+CXX_ubsan = clang++
+LD_ubsan = clang
+LDXX_ubsan = clang++
+CPPFLAGS_ubsan = -O1 -fsanitize=undefined -fno-omit-frame-pointer
+OPENSSL_CFLAGS_ubsan = -DPURIFY
+OPENSSL_CONFIG_ubsan = no-asm
+LDFLAGS_ubsan = -fsanitize=undefined
+DEFINES_ubsan = NDEBUG
+
 VALID_CONFIG_gcov = 1
 CC_gcov = gcc
 CXX_gcov = g++
diff --git a/tools/dockerfile/grpc_cxx/Dockerfile b/tools/dockerfile/grpc_cxx/Dockerfile
index 9b20e7a58e..e1ddfcb2da 100644
--- a/tools/dockerfile/grpc_cxx/Dockerfile
+++ b/tools/dockerfile/grpc_cxx/Dockerfile
@@ -4,7 +4,7 @@ FROM grpc/base
 RUN apt-get update && apt-get -y install libgflags-dev libgtest-dev
 
 # Get the source from GitHub
-RUN git clone git@github.com:google/grpc.git /var/local/git/grpc
+RUN git clone git@github.com:grpc/grpc.git /var/local/git/grpc
 RUN cd /var/local/git/grpc && \
   git pull --recurse-submodules && \
   git submodule update --init --recursive
diff --git a/tools/dockerfile/grpc_go/Dockerfile b/tools/dockerfile/grpc_go/Dockerfile
index 1b998152a7..42620ff3cf 100644
--- a/tools/dockerfile/grpc_go/Dockerfile
+++ b/tools/dockerfile/grpc_go/Dockerfile
@@ -17,11 +17,11 @@ RUN echo 'StrictHostKeyChecking no' >> $HOME/.ssh/config
 RUN git config --global url."git@github.com:".insteadOf "https://github.com/"
 
 # Get the source from GitHub
-RUN go get github.com/google/grpc-go/rpc
+RUN go get google.golang.org/grpc
 
 # Build the interop client and server
-RUN cd src/github.com/google/grpc-go/rpc/interop/client && go install
-RUN cd src/github.com/google/grpc-go/rpc/interop/server && go install
+RUN cd src/google.golang.org/grpc/interop/client && go install
+RUN cd src/google.golang.org/grpc/interop/server && go install
 
 # Specify the default command such that the interop server runs on its known testing port
-CMD ["/bin/bash", "-c", "cd src/github.com/google/grpc-go/rpc/interop/server && go run server.go --use_tls=true --port=8020"]
+CMD ["/bin/bash", "-c", "cd src/google.golang.org/grpc/interop/server && go run server.go --use_tls=true --port=8020"]
diff --git a/tools/dockerfile/grpc_java/Dockerfile b/tools/dockerfile/grpc_java/Dockerfile
index a5508cad7f..17682c63f0 100644
--- a/tools/dockerfile/grpc_java/Dockerfile
+++ b/tools/dockerfile/grpc_java/Dockerfile
@@ -1,7 +1,7 @@
 # Dockerfile for the gRPC Java dev image
 FROM grpc/java_base
 
-RUN git clone --recursive --depth 1 git@github.com:google/grpc-java.git /var/local/git/grpc-java
+RUN git clone --recursive --depth 1 git@github.com:grpc/grpc-java.git /var/local/git/grpc-java
 RUN cd /var/local/git/grpc-java/lib/netty && \
   mvn -pl codec-http2 -am -DskipTests install clean
 RUN cd /var/local/git/grpc-java && \
diff --git a/tools/dockerfile/grpc_java_base/Dockerfile b/tools/dockerfile/grpc_java_base/Dockerfile
index 5dbd781f7b..6031be484a 100644
--- a/tools/dockerfile/grpc_java_base/Dockerfile
+++ b/tools/dockerfile/grpc_java_base/Dockerfile
@@ -34,11 +34,12 @@ RUN wget -O - https://github.com/google/protobuf/archive/master.tar.gz | \
 # Install a GitHub SSH service credential that gives access to the GitHub repo while it's private
 # TODO: remove this once the repo is public
 COPY .ssh/github.rsa /root/.ssh/id_rsa
+RUN chmod 600 /root/.ssh/id_rsa
 RUN echo 'Host github.com\nStrictHostKeyChecking no' > /root/.ssh/config
 
 # Trigger download of as many Maven and Gradle artifacts as possible. We don't build grpc-java
 # because we don't want to install netty
-RUN git clone --recursive --depth 1 git@github.com:google/grpc-java.git && \
+RUN git clone --recursive --depth 1 git@github.com:grpc/grpc-java.git && \
   cd grpc-java/lib/netty && \
   mvn -pl codec-http2 -am -DskipTests verify && \
   cd ../.. && \
diff --git a/tools/dockerfile/grpc_node_base/Dockerfile b/tools/dockerfile/grpc_node_base/Dockerfile
index 28bd7b2556..20efde98ad 100644
--- a/tools/dockerfile/grpc_node_base/Dockerfile
+++ b/tools/dockerfile/grpc_node_base/Dockerfile
@@ -10,7 +10,7 @@ RUN apt-get update && apt-get install -y nodejs
 RUN npm install -g node-gyp
 
 # Get the source from GitHub, this gets the protobuf library as well
-RUN git clone git@github.com:google/grpc.git /var/local/git/grpc
+RUN git clone git@github.com:grpc/grpc.git /var/local/git/grpc
 RUN cd /var/local/git/grpc && \
   git pull --recurse-submodules && \
   git submodule update --init --recursive
@@ -19,4 +19,4 @@ RUN cd /var/local/git/grpc && \
 RUN make static_c shared_c -j12 -C /var/local/git/grpc
 
 # Define the default command.
-CMD ["bash"]
\ No newline at end of file
+CMD ["bash"]
diff --git a/tools/dockerfile/grpc_php_base/Dockerfile b/tools/dockerfile/grpc_php_base/Dockerfile
index ef58f3a887..f4bf3b09a4 100644
--- a/tools/dockerfile/grpc_php_base/Dockerfile
+++ b/tools/dockerfile/grpc_php_base/Dockerfile
@@ -62,7 +62,7 @@ ENV PATH /usr/local/rvm/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/s
 RUN rvm all do gem install ronn rake
 
 # Get the source from GitHub, this gets the protobuf library as well
-RUN git clone git@github.com:google/grpc.git /var/local/git/grpc
+RUN git clone git@github.com:grpc/grpc.git /var/local/git/grpc
 RUN cd /var/local/git/grpc && \
   git pull --recurse-submodules && \
   git submodule update --init --recursive
diff --git a/tools/dockerfile/grpc_ruby/Dockerfile b/tools/dockerfile/grpc_ruby/Dockerfile
index 47972e7eff..ff1b99ba37 100644
--- a/tools/dockerfile/grpc_ruby/Dockerfile
+++ b/tools/dockerfile/grpc_ruby/Dockerfile
@@ -6,7 +6,7 @@ RUN cd /var/local/git/grpc \
   && git pull --recurse-submodules \
   && git submodule update --init --recursive
 
-# Build the C core.
+# Build the C core
 RUN make install_c -C /var/local/git/grpc
 
 # Build ruby gRPC and run its tests
diff --git a/tools/dockerfile/grpc_ruby_base/Dockerfile b/tools/dockerfile/grpc_ruby_base/Dockerfile
index ec4544d2fd..a3a80daf9b 100644
--- a/tools/dockerfile/grpc_ruby_base/Dockerfile
+++ b/tools/dockerfile/grpc_ruby_base/Dockerfile
@@ -43,7 +43,7 @@ RUN /bin/bash -l -c "echo 'rvm --default use ruby-2.1' >> ~/.bashrc"
 RUN /bin/bash -l -c "gem install bundler --no-ri --no-rdoc"
 
 # Get the source from GitHub
-RUN git clone git@github.com:google/grpc.git /var/local/git/grpc
+RUN git clone git@github.com:grpc/grpc.git /var/local/git/grpc
 RUN cd /var/local/git/grpc && \
   git pull --recurse-submodules && \
   git submodule update --init --recursive
diff --git a/tools/dockerfile/msan_cxx/Dockerfile b/tools/dockerfile/msan_cxx/Dockerfile
new file mode 100644
index 0000000000..d12cee6b5d
--- /dev/null
+++ b/tools/dockerfile/msan_cxx/Dockerfile
@@ -0,0 +1,29 @@
+FROM ubuntu:latest
+
+RUN apt-get update && apt-get install -y \
+  cmake \
+  g++ \
+  gcc \
+  git \
+  make \
+  python \
+  && apt-get clean
+
+RUN git clone -b release_36 http://llvm.org/git/llvm.git
+RUN git clone -b release_36 http://llvm.org/git/clang.git
+RUN git clone -b release_36 http://llvm.org/git/compiler-rt.git
+RUN git clone -b release_36 http://llvm.org/git/clang-tools-extra.git
+RUN git clone -b release_36 http://llvm.org/git/libcxx.git
+RUN git clone -b release_36 http://llvm.org/git/libcxxabi.git
+
+RUN mv clang llvm/tools
+RUN mv compiler-rt llvm/projects
+RUN mv clang-tools-extra llvm/tools/clang/tools
+RUN mv libcxx llvm/projects
+RUN mv libcxxabi llvm/projects
+
+RUN mkdir llvm-build
+RUN cd llvm-build && cmake ../llvm
+RUN make -C llvm-build && make -C llvm-build install && rm -rf llvm-build
+
+CMD ["bash"]
diff --git a/tools/gce_setup/grpc_docker.sh b/tools/gce_setup/grpc_docker.sh
index 2e02653864..1c38582cb8 100755
--- a/tools/gce_setup/grpc_docker.sh
+++ b/tools/gce_setup/grpc_docker.sh
@@ -24,6 +24,10 @@
 # Allows gcloud ssh commands to run on freshly started docker instances.
 _grpc_ensure_gcloud_ssh() {
   local default_key_file="$HOME/.ssh/google_compute_engine"
+  if [ "$HOME" == "/" ]
+  then
+    default_key_file="/root/.ssh/google_compute_engine"
+  fi
   [ -f $default_key_file ] || {
     ssh-keygen -f $default_key_file -N '' > /dev/null || {
       echo "could not precreate $default_key_file" 1>&2
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index ab6728b4ee..0f3222b78c 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -111,6 +111,7 @@ _CONFIGS = {
     'tsan': SimpleConfig('tsan', environ={
         'TSAN_OPTIONS': 'suppressions=tools/tsan_suppressions.txt'}),
     'msan': SimpleConfig('msan'),
+    'ubsan': SimpleConfig('ubsan'),
     'asan': SimpleConfig('asan', environ={
         'ASAN_OPTIONS': 'detect_leaks=1:color=always:suppressions=tools/tsan_suppressions.txt'}),
     'gcov': SimpleConfig('gcov'),
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index b69faad26c..4da75a190e 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -291,11 +291,11 @@
   }, 
   {
     "language": "c++", 
-    "name": "tips_publisher_test"
+    "name": "pubsub_publisher_test"
   }, 
   {
     "language": "c++", 
-    "name": "tips_subscriber_test"
+    "name": "pubsub_subscriber_test"
   }, 
   {
     "language": "c",