Merge branch 'grpclb_resolver_changes' into grpclb_resolver_changes2

72 files changed, 773 insertions, 374 deletions

diff --git a/src/core/ext/client_config/resolver_result.c b/src/core/ext/client_config/resolver_result.c
index b0602d583d..ac263b9a46 100644
--- a/src/core/ext/client_config/resolver_result.c
+++ b/src/core/ext/client_config/resolver_result.c
@@ -1,35 +1,33 @@
-/*
- *
- * 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.
- *
- */
+//
+// 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 "src/core/ext/client_config/resolver_result.h"
 
@@ -38,8 +36,8 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/string_util.h>
 
-grpc_addresses *grpc_addresses_create(size_t num_addresses) {
-  grpc_addresses *addresses = gpr_malloc(sizeof(grpc_addresses));
+grpc_addresses* grpc_addresses_create(size_t num_addresses) {
+  grpc_addresses* addresses = gpr_malloc(sizeof(grpc_addresses));
   addresses->num_addresses = num_addresses;
   const size_t addresses_size = sizeof(grpc_address) * num_addresses;
   addresses->addresses = gpr_malloc(addresses_size);
@@ -47,37 +45,37 @@ grpc_addresses *grpc_addresses_create(size_t num_addresses) {
   return addresses;
 }
 
-grpc_addresses *grpc_addresses_copy(grpc_addresses* addresses) {
-  grpc_addresses *new = grpc_addresses_create(addresses->num_addresses);
+grpc_addresses* grpc_addresses_copy(grpc_addresses* addresses) {
+  grpc_addresses* new = grpc_addresses_create(addresses->num_addresses);
   memcpy(new->addresses, addresses->addresses,
          sizeof(grpc_address) * addresses->num_addresses);
   return new;
 }
 
-void grpc_addresses_set_address(grpc_addresses *addresses, size_t index,
-                                void *address, size_t address_len,
+void grpc_addresses_set_address(grpc_addresses* addresses, size_t index,
+                                void* address, size_t address_len,
                                 bool is_balancer) {
   GPR_ASSERT(index < addresses->num_addresses);
-  grpc_address *target = &addresses->addresses[index];
+  grpc_address* target = &addresses->addresses[index];
   memcpy(target->address.addr, address, address_len);
   target->address.len = address_len;
   target->is_balancer = is_balancer;
 }
 
-void grpc_addresses_destroy(grpc_addresses *addresses) {
+void grpc_addresses_destroy(grpc_addresses* addresses) {
   gpr_free(addresses->addresses);
   gpr_free(addresses);
 }
 
 struct grpc_resolver_result {
   gpr_refcount refs;
-  grpc_addresses *addresses;
-  char *lb_policy_name;
+  grpc_addresses* addresses;
+  char* lb_policy_name;
 };
 
-grpc_resolver_result *grpc_resolver_result_create(grpc_addresses *addresses,
-                                                  const char *lb_policy_name) {
-  grpc_resolver_result *result = gpr_malloc(sizeof(*result));
+grpc_resolver_result* grpc_resolver_result_create(grpc_addresses* addresses,
+                                                  const char* lb_policy_name) {
+  grpc_resolver_result* result = gpr_malloc(sizeof(*result));
   memset(result, 0, sizeof(*result));
   gpr_ref_init(&result->refs, 1);
   result->addresses = addresses;
@@ -85,12 +83,12 @@ grpc_resolver_result *grpc_resolver_result_create(grpc_addresses *addresses,
   return result;
 }
 
-void grpc_resolver_result_ref(grpc_resolver_result *result) {
+void grpc_resolver_result_ref(grpc_resolver_result* result) {
   gpr_ref(&result->refs);
 }
 
-void grpc_resolver_result_unref(grpc_exec_ctx *exec_ctx,
-                                grpc_resolver_result *result) {
+void grpc_resolver_result_unref(grpc_exec_ctx* exec_ctx,
+                                grpc_resolver_result* result) {
   if (gpr_unref(&result->refs)) {
     grpc_addresses_destroy(result->addresses);
     gpr_free(result->lb_policy_name);
@@ -98,12 +96,12 @@ void grpc_resolver_result_unref(grpc_exec_ctx *exec_ctx,
   }
 }
 
-grpc_addresses *grpc_resolver_result_get_addresses(
-    grpc_resolver_result *result) {
+grpc_addresses* grpc_resolver_result_get_addresses(
+    grpc_resolver_result* result) {
   return result->addresses;
 }
 
-const char *grpc_resolver_result_get_lb_policy_name(
-    grpc_resolver_result *result) {
+const char* grpc_resolver_result_get_lb_policy_name(
+    grpc_resolver_result* result) {
   return result->lb_policy_name;
 }
diff --git a/src/core/ext/client_config/resolver_result.h b/src/core/ext/client_config/resolver_result.h
index b1a3457565..fa60c8cc6d 100644
--- a/src/core/ext/client_config/resolver_result.h
+++ b/src/core/ext/client_config/resolver_result.h
@@ -1,35 +1,33 @@
-/*
- *
- * 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.
- *
- */
+//
+// 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.
+//
 
 #ifndef GRPC_CORE_EXT_CLIENT_CONFIG_RESOLVER_RESULT_H
 #define GRPC_CORE_EXT_CLIENT_CONFIG_RESOLVER_RESULT_H
@@ -39,7 +37,7 @@
 #include "src/core/ext/client_config/lb_policy.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 
-/** Used to represent addresses returned by the resolver. */
+/// Used to represent addresses returned by the resolver.
 typedef struct grpc_address {
   grpc_resolved_address address;
   bool is_balancer;
@@ -47,37 +45,37 @@ typedef struct grpc_address {
 
 typedef struct grpc_addresses {
   size_t num_addresses;
-  grpc_address *addresses;
+  grpc_address* addresses;
 } grpc_addresses;
 
-/** Returns a grpc_addresses struct with enough space for
-    \a num_addresses addresses. */
-grpc_addresses *grpc_addresses_create(size_t num_addresses);
+/// Returns a grpc_addresses struct with enough space for
+/// \a num_addresses addresses.
+grpc_addresses* grpc_addresses_create(size_t num_addresses);
 
-grpc_addresses *grpc_addresses_copy(grpc_addresses* addresses);
+grpc_addresses* grpc_addresses_copy(grpc_addresses* addresses);
 
-void grpc_addresses_set_address(grpc_addresses *addresses, size_t index,
-                                void *address, size_t address_len,
+void grpc_addresses_set_address(grpc_addresses* addresses, size_t index,
+                                void* address, size_t address_len,
                                 bool is_balancer);
 
-void grpc_addresses_destroy(grpc_addresses *addresses);
+void grpc_addresses_destroy(grpc_addresses* addresses);
 
-/** Results reported from a grpc_resolver. */
+/// Results reported from a grpc_resolver.
 typedef struct grpc_resolver_result grpc_resolver_result;
 
-/** Takes ownership of \a addresses. */
-grpc_resolver_result *grpc_resolver_result_create(grpc_addresses *addresses,
-                                                  const char *lb_policy_name);
-void grpc_resolver_result_ref(grpc_resolver_result *result);
-void grpc_resolver_result_unref(grpc_exec_ctx *exec_ctx,
-                                grpc_resolver_result *result);
+/// Takes ownership of \a addresses.
+grpc_resolver_result* grpc_resolver_result_create(grpc_addresses* addresses,
+                                                  const char* lb_policy_name);
+void grpc_resolver_result_ref(grpc_resolver_result* result);
+void grpc_resolver_result_unref(grpc_exec_ctx* exec_ctx,
+                                grpc_resolver_result* result);
 
-/** Caller does NOT take ownership of result. */
-grpc_addresses *grpc_resolver_result_get_addresses(
-    grpc_resolver_result *result);
+/// Caller does NOT take ownership of result.
+grpc_addresses* grpc_resolver_result_get_addresses(
+    grpc_resolver_result* result);
 
-/** Caller does NOT take ownership of result. */
-const char *grpc_resolver_result_get_lb_policy_name(
-    grpc_resolver_result *result);
+/// Caller does NOT take ownership of result.
+const char* grpc_resolver_result_get_lb_policy_name(
+    grpc_resolver_result* result);
 
 #endif /* GRPC_CORE_EXT_CLIENT_CONFIG_RESOLVER_RESULT_H */
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 0e8dfb7d96..00999e3b94 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -408,6 +408,19 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
           push_setting(exec_ctx, t, GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE,
                        (uint32_t)channel_args->args[i].value.integer);
         }
+      } else if (0 == strcmp(channel_args->args[i].key,
+                             GRPC_ARG_HTTP2_MAX_FRAME_SIZE)) {
+        if (channel_args->args[i].type != GRPC_ARG_INTEGER) {
+          gpr_log(GPR_ERROR, "%s: must be an integer",
+                  GRPC_ARG_HTTP2_MAX_FRAME_SIZE);
+        } else if (channel_args->args[i].value.integer < 16384 ||
+                   channel_args->args[i].value.integer > 16777215) {
+          gpr_log(GPR_ERROR, "%s: must be between 16384 and 16777215",
+                  GRPC_ARG_HTTP2_MAX_FRAME_SIZE);
+        } else {
+          push_setting(exec_ctx, t, GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE,
+                       (uint32_t)channel_args->args[i].value.integer);
+        }
       }
     }
   }
diff --git a/src/core/ext/transport/chttp2/transport/frame.h b/src/core/ext/transport/chttp2/transport/frame.h
index 7776609367..507aae4100 100644
--- a/src/core/ext/transport/chttp2/transport/frame.h
+++ b/src/core/ext/transport/chttp2/transport/frame.h
@@ -52,8 +52,6 @@ typedef struct grpc_chttp2_transport_parsing grpc_chttp2_transport_parsing;
 #define GRPC_CHTTP2_FRAME_GOAWAY 7
 #define GRPC_CHTTP2_FRAME_WINDOW_UPDATE 8
 
-#define GRPC_CHTTP2_MAX_PAYLOAD_LENGTH ((1 << 14) - 1)
-
 #define GRPC_CHTTP2_DATA_FLAG_END_STREAM 1
 #define GRPC_CHTTP2_FLAG_ACK 1
 #define GRPC_CHTTP2_DATA_FLAG_END_HEADERS 4
diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.c b/src/core/ext/transport/chttp2/transport/hpack_encoder.c
index 2cb8205d94..581471ba02 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_encoder.c
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.c
@@ -78,6 +78,8 @@ typedef struct {
   uint32_t stream_id;
   gpr_slice_buffer *output;
   grpc_transport_one_way_stats *stats;
+  /* maximum size of a frame */
+  size_t max_frame_size;
 } framer_state;
 
 /* fills p (which is expected to be 9 bytes long) with a data frame header */
@@ -123,7 +125,7 @@ static void begin_frame(framer_state *st) {
    needed */
 static void ensure_space(framer_state *st, size_t need_bytes) {
   if (st->output->length - st->output_length_at_start_of_frame + need_bytes <=
-      GRPC_CHTTP2_MAX_PAYLOAD_LENGTH) {
+      st->max_frame_size) {
     return;
   }
   finish_frame(st, 0, 0);
@@ -149,8 +151,8 @@ static void add_header_data(framer_state *st, gpr_slice slice) {
   size_t len = GPR_SLICE_LENGTH(slice);
   size_t remaining;
   if (len == 0) return;
-  remaining = GRPC_CHTTP2_MAX_PAYLOAD_LENGTH +
-              st->output_length_at_start_of_frame - st->output->length;
+  remaining = st->max_frame_size + st->output_length_at_start_of_frame -
+              st->output->length;
   if (len <= remaining) {
     st->stats->header_bytes += len;
     gpr_slice_buffer_add(st->output, slice);
@@ -542,6 +544,7 @@ void grpc_chttp2_hpack_compressor_set_max_table_size(
 void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c,
                                uint32_t stream_id,
                                grpc_metadata_batch *metadata, int is_eof,
+                               size_t max_frame_size,
                                grpc_transport_one_way_stats *stats,
                                gpr_slice_buffer *outbuf) {
   framer_state st;
@@ -555,6 +558,7 @@ void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c,
   st.output = outbuf;
   st.is_first_frame = 1;
   st.stats = stats;
+  st.max_frame_size = max_frame_size;
 
   /* Encode a metadata batch; store the returned values, representing
      a metadata element that needs to be unreffed back into the metadata
diff --git a/src/core/ext/transport/chttp2/transport/hpack_encoder.h b/src/core/ext/transport/chttp2/transport/hpack_encoder.h
index 0f7b0b063a..4c3a931549 100644
--- a/src/core/ext/transport/chttp2/transport/hpack_encoder.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.h
@@ -91,6 +91,7 @@ void grpc_chttp2_hpack_compressor_set_max_usable_size(
 
 void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c, uint32_t id,
                                grpc_metadata_batch *metadata, int is_eof,
+                               size_t max_frame_size,
                                grpc_transport_one_way_stats *stats,
                                gpr_slice_buffer *outbuf);
 
diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index e1dcf5262a..d67c014e54 100644
--- a/src/core/ext/transport/chttp2/transport/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -223,6 +223,8 @@ typedef struct {
   uint8_t is_client;
   /** callback for when writing is done */
   grpc_closure done_cb;
+  /** maximum frame size */
+  uint32_t max_frame_size;
 } grpc_chttp2_transport_writing;
 
 struct grpc_chttp2_transport_parsing {
diff --git a/src/core/ext/transport/chttp2/transport/writing.c b/src/core/ext/transport/chttp2/transport/writing.c
index 8f7a1f55c6..311b26e354 100644
--- a/src/core/ext/transport/chttp2/transport/writing.c
+++ b/src/core/ext/transport/chttp2/transport/writing.c
@@ -51,6 +51,10 @@ int grpc_chttp2_unlocking_check_writes(
 
   GPR_TIMER_BEGIN("grpc_chttp2_unlocking_check_writes", 0);
 
+  transport_writing->max_frame_size =
+      transport_global->settings[GRPC_ACKED_SETTINGS]
+                                [GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE];
+
   /* simple writes are queued to qbuf, and flushed here */
   gpr_slice_buffer_swap(&transport_global->qbuf, &transport_writing->outbuf);
   GPR_ASSERT(transport_global->qbuf.count == 0);
@@ -206,14 +210,15 @@ static void finalize_outbuf(grpc_exec_ctx *exec_ctx,
   while (
       grpc_chttp2_list_pop_writing_stream(transport_writing, &stream_writing)) {
     uint32_t max_outgoing =
-        (uint32_t)GPR_MIN(GRPC_CHTTP2_MAX_PAYLOAD_LENGTH,
+        (uint32_t)GPR_MIN(transport_writing->max_frame_size,
                           GPR_MIN(stream_writing->outgoing_window,
                                   transport_writing->outgoing_window));
     /* send initial metadata if it's available */
     if (stream_writing->send_initial_metadata != NULL) {
       grpc_chttp2_encode_header(
           &transport_writing->hpack_compressor, stream_writing->id,
-          stream_writing->send_initial_metadata, 0, &stream_writing->stats,
+          stream_writing->send_initial_metadata, 0,
+          transport_writing->max_frame_size, &stream_writing->stats,
           &transport_writing->outbuf);
       stream_writing->send_initial_metadata = NULL;
       stream_writing->sent_initial_metadata = 1;
@@ -303,7 +308,8 @@ static void finalize_outbuf(grpc_exec_ctx *exec_ctx,
       } else {
         grpc_chttp2_encode_header(
             &transport_writing->hpack_compressor, stream_writing->id,
-            stream_writing->send_trailing_metadata, 1, &stream_writing->stats,
+            stream_writing->send_trailing_metadata, 1,
+            transport_writing->max_frame_size, &stream_writing->stats,
             &transport_writing->outbuf);
       }
       if (!transport_writing->is_client && !stream_writing->read_closed) {
diff --git a/src/core/lib/channel/http_client_filter.c b/src/core/lib/channel/http_client_filter.c
index ef68cc86ea..edcc741ff6 100644
--- a/src/core/lib/channel/http_client_filter.c
+++ b/src/core/lib/channel/http_client_filter.c
@@ -233,7 +233,6 @@ static void hc_mutate_op(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
     if (method == GRPC_MDELEM_METHOD_GET) {
       /* allocate memory to hold the entire payload */
       calld->payload_bytes = gpr_malloc(op->send_message->length);
-      GPR_ASSERT(calld->payload_bytes);
 
       /* read slices of send_message and copy into payload_bytes */
       calld->send_op = *op;
diff --git a/src/core/lib/support/percent_encoding.c b/src/core/lib/support/percent_encoding.c
new file mode 100644
index 0000000000..3c19f264f9
--- /dev/null
+++ b/src/core/lib/support/percent_encoding.c
@@ -0,0 +1,180 @@
+/*
+ *
+ * Copyright 2016, 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 "src/core/lib/support/percent_encoding.h"
+
+#include <grpc/support/log.h>
+
+const uint8_t gpr_url_percent_encoding_unreserved_bytes[256 / 8] = {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0xff, 0x03, 0xfe, 0xff, 0xff,
+    0x87, 0xfe, 0xff, 0xff, 0x47, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+const uint8_t gpr_compatible_percent_encoding_unreserved_bytes[256 / 8] = {
+    0x00, 0x00, 0x00, 0x00, 0xdf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+static bool is_unreserved_character(uint8_t c,
+                                    const uint8_t *unreserved_bytes) {
+  return ((unreserved_bytes[c / 8] >> (c % 8)) & 1) != 0;
+}
+
+gpr_slice gpr_percent_encode_slice(gpr_slice slice,
+                                   const uint8_t *unreserved_bytes) {
+  static const uint8_t hex[] = "0123456789ABCDEF";
+
+  // first pass: count the number of bytes needed to output this string
+  size_t output_length = 0;
+  const uint8_t *slice_start = GPR_SLICE_START_PTR(slice);
+  const uint8_t *slice_end = GPR_SLICE_END_PTR(slice);
+  const uint8_t *p;
+  bool any_reserved_bytes = false;
+  for (p = slice_start; p < slice_end; p++) {
+    bool unres = is_unreserved_character(*p, unreserved_bytes);
+    output_length += unres ? 1 : 3;
+    any_reserved_bytes |= !unres;
+  }
+  // no unreserved bytes: return the string unmodified
+  if (!any_reserved_bytes) {
+    return gpr_slice_ref(slice);
+  }
+  // second pass: actually encode
+  gpr_slice out = gpr_slice_malloc(output_length);
+  uint8_t *q = GPR_SLICE_START_PTR(out);
+  for (p = slice_start; p < slice_end; p++) {
+    if (is_unreserved_character(*p, unreserved_bytes)) {
+      *q++ = *p;
+    } else {
+      *q++ = '%';
+      *q++ = hex[*p >> 4];
+      *q++ = hex[*p & 15];
+    }
+  }
+  GPR_ASSERT(q == GPR_SLICE_END_PTR(out));
+  return out;
+}
+
+static bool valid_hex(const uint8_t *p, const uint8_t *end) {
+  if (p >= end) return false;
+  return (*p >= '0' && *p <= '9') || (*p >= 'a' && *p <= 'f') ||
+         (*p >= 'A' && *p <= 'F');
+}
+
+static uint8_t dehex(uint8_t c) {
+  if (c >= '0' && c <= '9') return (uint8_t)(c - '0');
+  if (c >= 'A' && c <= 'F') return (uint8_t)(c - 'A' + 10);
+  if (c >= 'a' && c <= 'f') return (uint8_t)(c - 'a' + 10);
+  GPR_UNREACHABLE_CODE(return 255);
+}
+
+bool gpr_strict_percent_decode_slice(gpr_slice slice_in,
+                                     const uint8_t *unreserved_bytes,
+                                     gpr_slice *slice_out) {
+  const uint8_t *p = GPR_SLICE_START_PTR(slice_in);
+  const uint8_t *in_end = GPR_SLICE_END_PTR(slice_in);
+  size_t out_length = 0;
+  bool any_percent_encoded_stuff = false;
+  while (p != in_end) {
+    if (*p == '%') {
+      if (!valid_hex(++p, in_end)) return false;
+      if (!valid_hex(++p, in_end)) return false;
+      p++;
+      out_length++;
+      any_percent_encoded_stuff = true;
+    } else if (is_unreserved_character(*p, unreserved_bytes)) {
+      p++;
+      out_length++;
+    } else {
+      return false;
+    }
+  }
+  if (!any_percent_encoded_stuff) {
+    *slice_out = gpr_slice_ref(slice_in);
+    return true;
+  }
+  p = GPR_SLICE_START_PTR(slice_in);
+  *slice_out = gpr_slice_malloc(out_length);
+  uint8_t *q = GPR_SLICE_START_PTR(*slice_out);
+  while (p != in_end) {
+    if (*p == '%') {
+      *q++ = (uint8_t)(dehex(p[1]) << 4) | (dehex(p[2]));
+      p += 3;
+    } else {
+      *q++ = *p++;
+    }
+  }
+  GPR_ASSERT(q == GPR_SLICE_END_PTR(*slice_out));
+  return true;
+}
+
+gpr_slice gpr_permissive_percent_decode_slice(gpr_slice slice_in) {
+  const uint8_t *p = GPR_SLICE_START_PTR(slice_in);
+  const uint8_t *in_end = GPR_SLICE_END_PTR(slice_in);
+  size_t out_length = 0;
+  bool any_percent_encoded_stuff = false;
+  while (p != in_end) {
+    if (*p == '%') {
+      if (!valid_hex(p + 1, in_end) || !valid_hex(p + 2, in_end)) {
+        p++;
+        out_length++;
+      } else {
+        p += 3;
+        out_length++;
+        any_percent_encoded_stuff = true;
+      }
+    } else {
+      p++;
+      out_length++;
+    }
+  }
+  if (!any_percent_encoded_stuff) {
+    return gpr_slice_ref(slice_in);
+  }
+  p = GPR_SLICE_START_PTR(slice_in);
+  gpr_slice out = gpr_slice_malloc(out_length);
+  uint8_t *q = GPR_SLICE_START_PTR(out);
+  while (p != in_end) {
+    if (*p == '%') {
+      if (!valid_hex(p + 1, in_end) || !valid_hex(p + 2, in_end)) {
+        *q++ = *p++;
+      } else {
+        *q++ = (uint8_t)(dehex(p[1]) << 4) | (dehex(p[2]));
+        p += 3;
+      }
+    } else {
+      *q++ = *p++;
+    }
+  }
+  GPR_ASSERT(q == GPR_SLICE_END_PTR(out));
+  return out;
+}
diff --git a/src/core/lib/support/percent_encoding.h b/src/core/lib/support/percent_encoding.h
new file mode 100644
index 0000000000..000bf14ede
--- /dev/null
+++ b/src/core/lib/support/percent_encoding.h
@@ -0,0 +1,78 @@
+/*
+ *
+ * Copyright 2016, 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.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_SUPPORT_PERCENT_ENCODING_H
+#define GRPC_CORE_LIB_SUPPORT_PERCENT_ENCODING_H
+
+/* Percent encoding and decoding of slices.
+   Transforms arbitrary strings into safe-for-transmission strings by using
+   variants of percent encoding (RFC 3986).
+   Two major variants are supplied: one that strictly matches URL encoding,
+     and another which applies percent encoding only to non-http2 header
+     bytes (the 'compatible' variant) */
+
+#include <stdbool.h>
+
+#include <grpc/support/slice.h>
+
+/* URL percent encoding spec bitfield (usabel as 'unreserved_bytes' in
+   gpr_percent_encode_slice, gpr_strict_percent_decode_slice).
+   Flags [A-Za-z0-9-_.~] as unreserved bytes for the percent encoding routines
+   */
+extern const uint8_t gpr_url_percent_encoding_unreserved_bytes[256 / 8];
+/* URL percent encoding spec bitfield (usabel as 'unreserved_bytes' in
+   gpr_percent_encode_slice, gpr_strict_percent_decode_slice).
+   Flags ascii7 non-control characters excluding '%' as unreserved bytes for the
+   percent encoding routines */
+extern const uint8_t gpr_compatible_percent_encoding_unreserved_bytes[256 / 8];
+
+/* Percent-encode a slice, returning the new slice (this cannot fail):
+   unreserved_bytes is a bitfield indicating which bytes are considered
+   unreserved and thus do not need percent encoding */
+gpr_slice gpr_percent_encode_slice(gpr_slice slice,
+                                   const uint8_t *unreserved_bytes);
+/* Percent-decode a slice, strictly.
+   If the input is legal (contains no unreserved bytes, and legal % encodings),
+   returns true and sets *slice_out to the decoded slice.
+   If the input is not legal, returns false and leaves *slice_out untouched.
+   unreserved_bytes is a bitfield indicating which bytes are considered
+   unreserved and thus do not need percent encoding */
+bool gpr_strict_percent_decode_slice(gpr_slice slice_in,
+                                     const uint8_t *unreserved_bytes,
+                                     gpr_slice *slice_out);
+/* Percent-decode a slice, permissively.
+   If a % triplet can not be decoded, pass it through verbatim.
+   This cannot fail. */
+gpr_slice gpr_permissive_percent_decode_slice(gpr_slice slice_in);
+
+#endif /* GRPC_CORE_LIB_SUPPORT_PERCENT_ENCODING_H */
diff --git a/src/cpp/client/channel.cc b/src/cpp/client/channel_cc.cc
index 43b3875cb3..43b3875cb3 100644
--- a/src/cpp/client/channel.cc
+++ b/src/cpp/client/channel_cc.cc
diff --git a/src/cpp/client/client_context.cc b/src/cpp/client/client_context.cc
index 0ba77a5057..74bb7b0d1c 100644
--- a/src/cpp/client/client_context.cc
+++ b/src/cpp/client/client_context.cc
@@ -60,6 +60,7 @@ ClientContext::ClientContext()
     : initial_metadata_received_(false),
       fail_fast_(true),
       idempotent_(false),
+      cacheable_(false),
       call_(nullptr),
       call_canceled_(false),
       deadline_(gpr_inf_future(GPR_CLOCK_REALTIME)),
diff --git a/src/cpp/client/credentials.cc b/src/cpp/client/credentials_cc.cc
index e6a4f81b0d..e6a4f81b0d 100644
--- a/src/cpp/client/credentials.cc
+++ b/src/cpp/client/credentials_cc.cc
diff --git a/src/cpp/common/completion_queue.cc b/src/cpp/common/completion_queue_cc.cc
index 00cc102f92..00cc102f92 100644
--- a/src/cpp/common/completion_queue.cc
+++ b/src/cpp/common/completion_queue_cc.cc
diff --git a/src/cpp/server/server.cc b/src/cpp/server/server_cc.cc
index af04fd4ca6..af04fd4ca6 100644
--- a/src/cpp/server/server.cc
+++ b/src/cpp/server/server_cc.cc
diff --git a/src/cpp/util/byte_buffer.cc b/src/cpp/util/byte_buffer_cc.cc
index 91ed66b766..91ed66b766 100644
--- a/src/cpp/util/byte_buffer.cc
+++ b/src/cpp/util/byte_buffer_cc.cc
diff --git a/src/cpp/util/slice.cc b/src/cpp/util/slice_cc.cc
index 7e88423b6c..7e88423b6c 100644
--- a/src/cpp/util/slice.cc
+++ b/src/cpp/util/slice_cc.cc
diff --git a/src/cpp/util/time.cc b/src/cpp/util/time_cc.cc
index c43d848cc6..c43d848cc6 100644
--- a/src/cpp/util/time.cc
+++ b/src/cpp/util/time_cc.cc
diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.csproj b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
index 7a6955311a..a44aaf1fdd 100644
--- a/src/csharp/Grpc.Auth/Grpc.Auth.csproj
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
@@ -49,14 +49,26 @@
     <Reference Include="Newtonsoft.Json">
       <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
+    <Reference Include="log4net">
+      <HintPath>..\packages\log4net.2.0.3\lib\net40-full\log4net.dll</HintPath>
+    </Reference>
     <Reference Include="Google.Apis.Core">
-      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Core.1.16.0\lib\net45\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Zlib.Portable">
+      <HintPath>..\packages\Zlib.Portable.Signed.1.11.0\lib\portable-net4+sl5+wp8+win8+wpa81+MonoTouch+MonoAndroid\Zlib.Portable.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.PlatformServices">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.PlatformServices.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth.PlatformServices">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.Auth/packages.config b/src/csharp/Grpc.Auth/packages.config
index 738d3e6f3b..11c6375c63 100644
--- a/src/csharp/Grpc.Auth/packages.config
+++ b/src/csharp/Grpc.Auth/packages.config
@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
+  <package id="Google.Apis" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.16.0" targetFramework="net45" />
+  <package id="log4net" version="2.0.3" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
+  <package id="Zlib.Portable.Signed" version="1.11.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 30f0944693..595e29f50a 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -23,18 +23,13 @@
   },
   "dependencies": {
     "Grpc.Core": "1.1.0-dev",
-    "Google.Apis.Auth": "1.15.0"
+    "Google.Apis.Auth": "1.16.0"
   },
   "frameworks": {
     "net45": { },
     "netstandard1.5": {
-      "imports": [
-        "portable-net45"
-      ],
       "dependencies": {
-        "Microsoft.NETCore.Portable.Compatibility": "1.0.1",
-        "NETStandard.Library": "1.6.0",
-        "System.Threading.Tasks": "4.0.11"
+        "NETStandard.Library": "1.6.0"
       }
     }
   }
diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
index 014e2262e9..faf28dcee8 100644
--- a/src/csharp/Grpc.Core.Tests/project.json
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -42,11 +42,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.Core": {
@@ -66,8 +61,10 @@
         "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": "1.0.0",
-        "NETStandard.Library": "1.6.0"
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
       }
     }
   },
diff --git a/src/csharp/Grpc.Core/GrpcEnvironment.cs b/src/csharp/Grpc.Core/GrpcEnvironment.cs
index 574e900a0e..3ed2df203d 100644
--- a/src/csharp/Grpc.Core/GrpcEnvironment.cs
+++ b/src/csharp/Grpc.Core/GrpcEnvironment.cs
@@ -351,11 +351,11 @@ namespace Grpc.Core
                 {
                     if (!hooksRegistered)
                     {
-                        // TODO(jtattermusch): register shutdownhooks for CoreCLR as well
-#if !NETSTANDARD1_5
-
-                        AppDomain.CurrentDomain.ProcessExit += ShutdownHookHandler;
-                        AppDomain.CurrentDomain.DomainUnload += ShutdownHookHandler;
+#if NETSTANDARD1_5
+                        System.Runtime.Loader.AssemblyLoadContext.Default.Unloading += (assemblyLoadContext) => { HandleShutdown(); };
+#else
+                        AppDomain.CurrentDomain.ProcessExit += (sender, eventArgs) => { HandleShutdown(); };
+                        AppDomain.CurrentDomain.DomainUnload += (sender, eventArgs) => { HandleShutdown(); };
 #endif
                     }
                     hooksRegistered = true;
@@ -363,9 +363,9 @@ namespace Grpc.Core
             }
 
             /// <summary>
-            /// Handler for AppDomain.DomainUnload and AppDomain.ProcessExit hooks.
+            /// Handler for AppDomain.DomainUnload, AppDomain.ProcessExit and AssemblyLoadContext.Unloading hooks.
             /// </summary>
-            private static void ShutdownHookHandler(object sender, EventArgs e)
+            private static void HandleShutdown()
             {
                 Task.WaitAll(GrpcEnvironment.ShutdownChannelsAsync(), GrpcEnvironment.KillServersAsync());
             }
diff --git a/src/csharp/Grpc.Core/Internal/NativeExtension.cs b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
index 509baf7cb1..61d8b57c76 100644
--- a/src/csharp/Grpc.Core/Internal/NativeExtension.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
@@ -100,19 +100,19 @@ namespace Grpc.Core.Internal
 
             // With old-style VS projects, the native libraries get copied using a .targets rule to the build output folder
             // alongside the compiled assembly.
-            // With dotnet cli projects, the native libraries (just the required ones) are similarly copied to the built output folder,
-            // through the magic of Microsoft.NETCore.Platforms.
+            // With dotnet cli projects targeting net45 framework, the native libraries (just the required ones)
+            // are similarly copied to the built output folder, through the magic of Microsoft.NETCore.Platforms.
             var classicPath = Path.Combine(assemblyDirectory, GetNativeLibraryFilename());
 
-            // DNX-style project.json projects will use Grpc.Core assembly directly in the location where it got restored
+            // With dotnet cli project targeting netcoreapp1.0, projects will use Grpc.Core assembly directly in the location where it got restored
             // by nuget. We locate the native libraries based on known structure of Grpc.Core nuget package.
+            // When "dotnet publish" is used, the runtimes directory is copied next to the published assemblies.
+            string runtimesDirectory = string.Format("runtimes/{0}/native", GetPlatformString());
+            var netCorePublishedAppStylePath = Path.Combine(assemblyDirectory, runtimesDirectory, GetNativeLibraryFilename());
+            var netCoreAppStylePath = Path.Combine(assemblyDirectory, "../..", runtimesDirectory, GetNativeLibraryFilename());
 
-            // TODO: Support .NET Core applications, which act slightly differently. We may be okay if "dotnet publish"
-            // is used, but "dotnet run" leaves the native libraries in-package, while copying assemblies.
-            string platform = GetPlatformString();
-            string relativeDirectory = string.Format("../../runtimes/{0}/native", platform);
-            var dnxStylePath = Path.Combine(assemblyDirectory, relativeDirectory, GetNativeLibraryFilename());
-            string[] paths = new[] { classicPath, dnxStylePath };
+            // Look for all native library in all possible locations in given order.
+            string[] paths = new[] { classicPath, netCorePublishedAppStylePath, netCoreAppStylePath};
             return new UnmanagedLibrary(paths);
         }
 
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index f7e21a25dd..aa1e4cc7fb 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -36,11 +36,9 @@
   "frameworks": {
     "net45": { },
     "netstandard1.5": {
-      "imports": [
-        "portable-net45"
-      ],
       "dependencies": {
         "NETStandard.Library": "1.6.0",
+        "System.Runtime.Loader": "4.0.0",
         "System.Threading.Thread": "4.0.0"
       }
     }
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index ad319478ab..628f532966 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -42,11 +42,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.Examples": {
@@ -56,12 +51,11 @@
   "frameworks": {
     "net45": { },
     "netcoreapp1.0": {
-      "imports": [
-        "portable-net45"
-      ],
       "dependencies": {
-        "Microsoft.NETCore.App": "1.0.0",
-        "NETStandard.Library": "1.6.0"
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
       }
     }
   }
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index ad319478ab..628f532966 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -42,11 +42,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.Examples": {
@@ -56,12 +51,11 @@
   "frameworks": {
     "net45": { },
     "netcoreapp1.0": {
-      "imports": [
-        "portable-net45"
-      ],
       "dependencies": {
-        "Microsoft.NETCore.App": "1.0.0",
-        "NETStandard.Library": "1.6.0"
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
       }
     }
   }
diff --git a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
index c8801a9413..a114d96127 100644
--- a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
+++ b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
@@ -36,9 +36,6 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="nunit.framework">
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
@@ -48,6 +45,9 @@
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
     </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.Examples.Tests/packages.config b/src/csharp/Grpc.Examples.Tests/packages.config
index cc473eb34c..f14517d2e2 100644
--- a/src/csharp/Grpc.Examples.Tests/packages.config
+++ b/src/csharp/Grpc.Examples.Tests/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
   <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
index 1cd1848e99..0109617e6b 100644
--- a/src/csharp/Grpc.Examples.Tests/project.json
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -42,11 +42,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.Examples": {
@@ -62,8 +57,10 @@
         "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": "1.0.0",
-        "NETStandard.Library": "1.6.0"
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
       }
     }
   }
diff --git a/src/csharp/Grpc.Examples/Grpc.Examples.csproj b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
index 4521649b6f..dcbef5fc0b 100644
--- a/src/csharp/Grpc.Examples/Grpc.Examples.csproj
+++ b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
@@ -37,10 +37,6 @@
     <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Google.Protobuf, Version=3.0.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="nunit.framework">
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
@@ -50,6 +46,9 @@
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\packages\System.Interactive.Async.3.0.0\lib\net45\System.Interactive.Async.dll</HintPath>
     </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.Examples/packages.config b/src/csharp/Grpc.Examples/packages.config
index 8985ae4c77..d17347f08f 100644
--- a/src/csharp/Grpc.Examples/packages.config
+++ b/src/csharp/Grpc.Examples/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples/project.json b/src/csharp/Grpc.Examples/project.json
index 98bd5d852c..21a730cb22 100644
--- a/src/csharp/Grpc.Examples/project.json
+++ b/src/csharp/Grpc.Examples/project.json
@@ -1,17 +1,12 @@
 {
   "buildOptions": {
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.Core": {
       "target": "project"
     },
-    "Google.Protobuf": "3.0.0-beta3"
+    "Google.Protobuf": "3.0.0"
   },
   "frameworks": {
     "net45": {
@@ -21,12 +16,11 @@
       }
     },
     "netcoreapp1.0": {
-      "imports": [
-        "portable-net45"
-      ],
       "dependencies": {
-        "Microsoft.NETCore.App": "1.0.0",
-        "NETStandard.Library": "1.6.0"
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
       }
     }
   }
diff --git a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
index aefacfbcc0..93c3b3a55f 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
+++ b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
@@ -44,15 +44,15 @@
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="nunit.framework">
       <HintPath>..\packages\NUnit.3.2.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
     </Reference>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.HealthCheck.Tests/packages.config b/src/csharp/Grpc.HealthCheck.Tests/packages.config
index 2bcfec8829..e796d6b135 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/packages.config
+++ b/src/csharp/Grpc.HealthCheck.Tests/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
   <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
index faa4400304..66dcd79a39 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/project.json
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -42,11 +42,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.HealthCheck": {
@@ -62,8 +57,10 @@
         "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": "1.0.0",
-        "NETStandard.Library": "1.6.0"
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
       }
     }
   }
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
index e13416cc1a..54a2984964 100644
--- a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
+++ b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
@@ -38,10 +38,6 @@
     <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Google.Protobuf, Version=3.0.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
@@ -53,6 +49,9 @@
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
diff --git a/src/csharp/Grpc.HealthCheck/packages.config b/src/csharp/Grpc.HealthCheck/packages.config
index 063094f775..f8e353bf26 100644
--- a/src/csharp/Grpc.HealthCheck/packages.config
+++ b/src/csharp/Grpc.HealthCheck/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
   <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index 7c062a7e40..9d631229d8 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -23,7 +23,7 @@
   },
   "dependencies": {
     "Grpc.Core": "1.1.0-dev",
-    "Google.Protobuf": "3.0.0-beta3"
+    "Google.Protobuf": "3.0.0"
   },
   "frameworks": {
     "net45": {
@@ -33,9 +33,6 @@
       }
     },
     "netstandard1.5": {
-      "imports": [
-        "portable-net45"
-      ],
       "dependencies": {
         "NETStandard.Library": "1.6.0"
       }
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
index 6816b5c5a2..ae58073b52 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
@@ -49,14 +49,26 @@
     <Reference Include="Newtonsoft.Json">
       <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
+    <Reference Include="log4net">
+      <HintPath>..\packages\log4net.2.0.3\lib\net40-full\log4net.dll</HintPath>
+    </Reference>
     <Reference Include="Google.Apis.Core">
-      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Core.1.16.0\lib\net45\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Zlib.Portable">
+      <HintPath>..\packages\Zlib.Portable.Signed.1.11.0\lib\portable-net4+sl5+wp8+win8+wpa81+MonoTouch+MonoAndroid\Zlib.Portable.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.PlatformServices">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.PlatformServices.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth.PlatformServices">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/packages.config b/src/csharp/Grpc.IntegrationTesting.Client/packages.config
index 738d3e6f3b..11c6375c63 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting.Client/packages.config
@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
+  <package id="Google.Apis" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.16.0" targetFramework="net45" />
+  <package id="log4net" version="2.0.3" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
+  <package id="Zlib.Portable.Signed" version="1.11.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
index 287950720f..1b900c8af3 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -13,8 +13,10 @@
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
         },
         "copyToOutput": {
-          "include": "data/*",
           "mappings": {
+            "data/ca.pem": "../Grpc.IntegrationTesting/data/ca.pem",
+            "data/server1.key": "../Grpc.IntegrationTesting/data/server1.key",
+            "data/server1.pem": "../Grpc.IntegrationTesting/data/server1.pem",
             "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
             "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
             "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
@@ -33,8 +35,10 @@
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
         },
         "copyToOutput": {
-          "include": "data/*",
           "mappings": {
+            "data/ca.pem": "../Grpc.IntegrationTesting/data/ca.pem",
+            "data/server1.key": "../Grpc.IntegrationTesting/data/server1.key",
+            "data/server1.pem": "../Grpc.IntegrationTesting/data/server1.pem",
             "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
             "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
             "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
@@ -44,11 +48,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.IntegrationTesting": {
@@ -59,12 +58,13 @@
     "net45": { },
     "netcoreapp1.0": {
       "imports": [
-        "portable-net45",
-        "net45"
+        "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": "1.0.0",
-        "NETStandard.Library": "1.6.0"
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
       }
     }
   }
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index 287950720f..1b900c8af3 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -13,8 +13,10 @@
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
         },
         "copyToOutput": {
-          "include": "data/*",
           "mappings": {
+            "data/ca.pem": "../Grpc.IntegrationTesting/data/ca.pem",
+            "data/server1.key": "../Grpc.IntegrationTesting/data/server1.key",
+            "data/server1.pem": "../Grpc.IntegrationTesting/data/server1.pem",
             "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
             "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
             "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
@@ -33,8 +35,10 @@
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
         },
         "copyToOutput": {
-          "include": "data/*",
           "mappings": {
+            "data/ca.pem": "../Grpc.IntegrationTesting/data/ca.pem",
+            "data/server1.key": "../Grpc.IntegrationTesting/data/server1.key",
+            "data/server1.pem": "../Grpc.IntegrationTesting/data/server1.pem",
             "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
             "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
             "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
@@ -44,11 +48,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.IntegrationTesting": {
@@ -59,12 +58,13 @@
     "net45": { },
     "netcoreapp1.0": {
       "imports": [
-        "portable-net45",
-        "net45"
+        "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": "1.0.0",
-        "NETStandard.Library": "1.6.0"
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
       }
     }
   }
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
index 987387ca25..d5c40ba948 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
@@ -49,14 +49,26 @@
     <Reference Include="Newtonsoft.Json">
       <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
+    <Reference Include="log4net">
+      <HintPath>..\packages\log4net.2.0.3\lib\net40-full\log4net.dll</HintPath>
+    </Reference>
     <Reference Include="Google.Apis.Core">
-      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Core.1.16.0\lib\net45\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Zlib.Portable">
+      <HintPath>..\packages\Zlib.Portable.Signed.1.11.0\lib\portable-net4+sl5+wp8+win8+wpa81+MonoTouch+MonoAndroid\Zlib.Portable.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.PlatformServices">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.PlatformServices.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth.PlatformServices">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/packages.config b/src/csharp/Grpc.IntegrationTesting.Server/packages.config
index 738d3e6f3b..11c6375c63 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting.Server/packages.config
@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
+  <package id="Google.Apis" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.16.0" targetFramework="net45" />
+  <package id="log4net" version="2.0.3" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
+  <package id="Zlib.Portable.Signed" version="1.11.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
index 287950720f..1b900c8af3 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -13,8 +13,10 @@
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
         },
         "copyToOutput": {
-          "include": "data/*",
           "mappings": {
+            "data/ca.pem": "../Grpc.IntegrationTesting/data/ca.pem",
+            "data/server1.key": "../Grpc.IntegrationTesting/data/server1.key",
+            "data/server1.pem": "../Grpc.IntegrationTesting/data/server1.pem",
             "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
             "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
             "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
@@ -33,8 +35,10 @@
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
         },
         "copyToOutput": {
-          "include": "data/*",
           "mappings": {
+            "data/ca.pem": "../Grpc.IntegrationTesting/data/ca.pem",
+            "data/server1.key": "../Grpc.IntegrationTesting/data/server1.key",
+            "data/server1.pem": "../Grpc.IntegrationTesting/data/server1.pem",
             "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
             "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
             "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
@@ -44,11 +48,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.IntegrationTesting": {
@@ -59,12 +58,13 @@
     "net45": { },
     "netcoreapp1.0": {
       "imports": [
-        "portable-net45",
-        "net45"
+        "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": "1.0.0",
-        "NETStandard.Library": "1.6.0"
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
       }
     }
   }
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
index 287950720f..1b900c8af3 100644
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
@@ -13,8 +13,10 @@
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
         },
         "copyToOutput": {
-          "include": "data/*",
           "mappings": {
+            "data/ca.pem": "../Grpc.IntegrationTesting/data/ca.pem",
+            "data/server1.key": "../Grpc.IntegrationTesting/data/server1.key",
+            "data/server1.pem": "../Grpc.IntegrationTesting/data/server1.pem",
             "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
             "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
             "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
@@ -33,8 +35,10 @@
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
         },
         "copyToOutput": {
-          "include": "data/*",
           "mappings": {
+            "data/ca.pem": "../Grpc.IntegrationTesting/data/ca.pem",
+            "data/server1.key": "../Grpc.IntegrationTesting/data/server1.key",
+            "data/server1.pem": "../Grpc.IntegrationTesting/data/server1.pem",
             "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
             "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
             "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
@@ -44,11 +48,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.IntegrationTesting": {
@@ -59,12 +58,13 @@
     "net45": { },
     "netcoreapp1.0": {
       "imports": [
-        "portable-net45",
-        "net45"
+        "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": "1.0.0",
-        "NETStandard.Library": "1.6.0"
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
       }
     }
   }
diff --git a/src/csharp/Grpc.IntegrationTesting/GeneratedClientTest.cs b/src/csharp/Grpc.IntegrationTesting/GeneratedClientTest.cs
index c17ede7561..ac6c8d0740 100644
--- a/src/csharp/Grpc.IntegrationTesting/GeneratedClientTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/GeneratedClientTest.cs
@@ -48,8 +48,6 @@ namespace Grpc.IntegrationTesting
     {
         TestService.TestServiceClient unimplementedClient = new UnimplementedTestServiceClient();
 
-        // TODO: replace Moq by some mocking library with CoreCLR support.
-#if !NETCOREAPP1_0
         [Test]
         public void ExpandedParamOverloadCanBeMocked()
         {
@@ -72,7 +70,6 @@ namespace Grpc.IntegrationTesting
 
             Assert.AreSame(expected, mockClient.Object.UnaryCall(new SimpleRequest(), new CallOptions()));
         }
-#endif
 
         [Test]
         public void DefaultMethodStubThrows_UnaryCall()
diff --git a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
index e030b21eec..afd85fb484 100644
--- a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
+++ b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
@@ -38,9 +38,6 @@
     <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Moq">
-      <HintPath>..\packages\Moq.4.2.1510.2205\lib\net40\Moq.dll</HintPath>
-    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Net" />
     <Reference Include="System.Net.Http" />
@@ -48,9 +45,6 @@
     <Reference Include="BouncyCastle.Crypto">
       <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Protobuf">
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
-    </Reference>
     <Reference Include="Newtonsoft.Json">
       <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
@@ -63,17 +57,38 @@
     <Reference Include="nunitlite">
       <HintPath>..\packages\NUnitLite.3.2.0\lib\net45\nunitlite.dll</HintPath>
     </Reference>
+    <Reference Include="CommandLineParser.Unofficial">
+      <HintPath>..\packages\CommandLineParser.Unofficial.2.0.275\lib\net45\CommandLineParser.Unofficial.dll</HintPath>
+    </Reference>
+    <Reference Include="log4net">
+      <HintPath>..\packages\log4net.2.0.3\lib\net40-full\log4net.dll</HintPath>
+    </Reference>
     <Reference Include="Google.Apis.Core">
-      <HintPath>..\packages\Google.Apis.Core.1.15.0\lib\net45\Google.Apis.Core.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Core.1.16.0\lib\net45\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Zlib.Portable">
+      <HintPath>..\packages\Zlib.Portable.Signed.1.11.0\lib\portable-net4+sl5+wp8+win8+wpa81+MonoTouch+MonoAndroid\Zlib.Portable.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.PlatformServices">
+      <HintPath>..\packages\Google.Apis.1.16.0\lib\net45\Google.Apis.PlatformServices.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
     <Reference Include="Google.Apis.Auth.PlatformServices">
-      <HintPath>..\packages\Google.Apis.Auth.1.15.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.16.0\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
-    <Reference Include="CommandLineParser.Unofficial">
-      <HintPath>..\packages\CommandLineParser.Unofficial.2.0.275\lib\net45\CommandLineParser.Unofficial.dll</HintPath>
+    <Reference Include="Google.Protobuf">
+      <HintPath>..\packages\Google.Protobuf.3.0.0\lib\net45\Google.Protobuf.dll</HintPath>
+    </Reference>
+    <Reference Include="Castle.Core">
+      <HintPath>..\packages\Castle.Core.3.3.3\lib\net45\Castle.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Moq">
+      <HintPath>..\packages\Moq.4.6.38-alpha\lib\net45\Moq.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.IntegrationTesting/packages.config b/src/csharp/Grpc.IntegrationTesting/packages.config
index 8bf9dd4937..a39fb3a23e 100644
--- a/src/csharp/Grpc.IntegrationTesting/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting/packages.config
@@ -1,13 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
+  <package id="Castle.Core" version="3.3.3" targetFramework="net45" />
   <package id="CommandLineParser.Unofficial" version="2.0.275" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.15.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.15.0" targetFramework="net45" />
-  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
-  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
-  <package id="Moq" version="4.2.1510.2205" targetFramework="net45" />
+  <package id="Google.Apis" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.16.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0" targetFramework="net45" />
+  <package id="log4net" version="2.0.3" targetFramework="net45" />
+  <package id="Moq" version="4.6.38-alpha" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
   <package id="NUnit" version="3.2.0" targetFramework="net45" />
   <package id="NUnitLite" version="3.2.0" targetFramework="net45" />
+  <package id="System.Interactive.Async" version="3.0.0" targetFramework="net45" />
+  <package id="Zlib.Portable.Signed" version="1.11.0" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index 9d706510b2..0225abb414 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -13,8 +13,10 @@
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
         },
         "copyToOutput": {
-          "include": "data/*",
           "mappings": {
+            "data/ca.pem": "../Grpc.IntegrationTesting/data/ca.pem",
+            "data/server1.key": "../Grpc.IntegrationTesting/data/server1.key",
+            "data/server1.pem": "../Grpc.IntegrationTesting/data/server1.pem",
             "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
             "grpc_csharp_ext.x86.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
             "libgrpc_csharp_ext.x64.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
@@ -33,8 +35,10 @@
           "includeFiles": [ "../Grpc.Core/Version.cs" ]
         },
         "copyToOutput": {
-          "include": "data/*",
           "mappings": {
+            "data/ca.pem": "../Grpc.IntegrationTesting/data/ca.pem",
+            "data/server1.key": "../Grpc.IntegrationTesting/data/server1.key",
+            "data/server1.pem": "../Grpc.IntegrationTesting/data/server1.pem",
             "grpc_csharp_ext.x64.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
             "grpc_csharp_ext.x86.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
             "libgrpc_csharp_ext.x64.so": "../../../libs/opt/libgrpc_csharp_ext.so",
@@ -44,11 +48,6 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": { },
-    "osx.10.11-x64": { }
-  },
 
   "dependencies": {
     "Grpc.Auth": {
@@ -57,16 +56,14 @@
     "Grpc.Core": {
       "target": "project"
     },
-    "Google.Protobuf": "3.0.0-beta3",
+    "Google.Protobuf": "3.0.0",
     "CommandLineParser.Unofficial": "2.0.275",
+    "Moq": "4.6.38-alpha",
     "NUnit": "3.2.0",
     "NUnitLite": "3.2.0-*"
   },
   "frameworks": {
     "net45": {
-      "dependencies": {
-        "Moq": "4.2.1510.2205"
-      },
       "frameworkAssemblies": {
         "System.Runtime": "",
         "System.IO": ""
@@ -74,12 +71,13 @@
     },
     "netcoreapp1.0": {
       "imports": [
-        "portable-net45",
-        "net45"
+        "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": "1.0.0",
-        "NETStandard.Library": "1.6.0",
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        },
         "System.Linq.Expressions": "4.1.0"
       }
     }
diff --git a/src/csharp/build_packages_dotnetcli.sh b/src/csharp/build_packages_dotnetcli.sh
new file mode 100755
index 0000000000..2807278de6
--- /dev/null
+++ b/src/csharp/build_packages_dotnetcli.sh
@@ -0,0 +1,73 @@
+#!/bin/bash
+# Copyright 2016, 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.
+
+set -ex
+
+cd $(dirname $0)
+
+mkdir -p ../../artifacts/
+
+# IMPORTANT: NuGet packages generated by dotnet CLI are considered experimental.
+# The official nugets are generated by src/csharp/build_packages.bat
+
+mkdir -p nativelibs/windows_x86 nativelibs/windows_x64 \
+    nativelibs/linux_x86 nativelibs/linux_x64 \
+    nativelibs/macosx_x86 nativelibs/macosx_x64
+
+mkdir -p protoc_plugins/windows_x86 protoc_plugins/windows_x64 \
+    protoc_plugins/linux_x86 protoc_plugins/linux_x64 \
+    protoc_plugins/macosx_x86 protoc_plugins/macosx_x64
+
+# Collect the artifacts built by the previous build step if running on Jenkins
+cp $EXTERNAL_GIT_ROOT/architecture=x86,language=csharp,platform=windows/artifacts/* nativelibs/windows_x86 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x64,language=csharp,platform=windows/artifacts/* nativelibs/windows_x64 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x86,language=csharp,platform=linux/artifacts/* nativelibs/linux_x86 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x64,language=csharp,platform=linux/artifacts/* nativelibs/linux_x64 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x86,language=csharp,platform=macos/artifacts/* nativelibs/macosx_x86 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x64,language=csharp,platform=macos/artifacts/* nativelibs/macosx_x64 || true
+
+# Collect protoc artifacts built by the previous build step
+cp $EXTERNAL_GIT_ROOT/architecture=x86,language=protoc,platform=windows/artifacts/* protoc_plugins/windows_x86 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x64,language=protoc,platform=windows/artifacts/* protoc_plugins/windows_x64 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x86,language=protoc,platform=linux/artifacts/* protoc_plugins/linux_x86 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x64,language=protoc,platform=linux/artifacts/* protoc_plugins/linux_x64 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x86,language=protoc,platform=macos/artifacts/* protoc_plugins/macosx_x86 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x64,language=protoc,platform=macos/artifacts/* protoc_plugins/macosx_x64 || true
+
+dotnet restore .
+
+dotnet pack --configuration Release Grpc.Core/project.json --output ../../artifacts
+dotnet pack --configuration Release Grpc.Auth/project.json --output ../../artifacts
+dotnet pack --configuration Release Grpc.HealthCheck/project.json --output ../../artifacts
+
+nuget pack Grpc.nuspec -Version "1.1.0-dev" -OutputDirectory ../../artifacts
+nuget pack Grpc.Tools.nuspec -Version "1.1.0-dev" -OutputDirectory ../../artifacts
+
+(cd ../../artifacts && zip csharp_nugets_dotnetcli.zip *.nupkg)
diff --git a/src/csharp/ext/grpc_csharp_ext.c b/src/csharp/ext/grpc_csharp_ext.c
index 3d0947c03d..068bf709b8 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -255,8 +255,10 @@ GPR_EXPORT intptr_t GPR_CALLTYPE grpcsharp_batch_context_recv_message_length(
   }
 
   GPR_ASSERT(grpc_byte_buffer_reader_init(&reader, ctx->recv_message));
+  intptr_t result = (intptr_t)grpc_byte_buffer_length(reader.buffer_out);
+  grpc_byte_buffer_reader_destroy(&reader);
 
-  return (intptr_t)grpc_byte_buffer_length(reader.buffer_out);
+  return result;
 }
 
 /*
@@ -279,6 +281,8 @@ GPR_EXPORT void GPR_CALLTYPE grpcsharp_batch_context_recv_message_to_buffer(
     offset += len;
     gpr_slice_unref(slice);
   }
+
+  grpc_byte_buffer_reader_destroy(&reader);
 }
 
 GPR_EXPORT grpc_status_code GPR_CALLTYPE
diff --git a/src/node/README.md b/src/node/README.md
index 15d4c6d02f..9eafce9243 100644
--- a/src/node/README.md
+++ b/src/node/README.md
@@ -39,7 +39,7 @@ npm install grpc
 To run the test suite, simply run `npm test` in the install location.
 
 ## API
-This library internally uses [ProtoBuf.js](https://github.com/dcodeIO/ProtoBuf.js), and some structures it exports match those exported by that library
+This library internally uses [ProtoBuf.js](https://github.com/dcodeIO/ProtoBuf.js), and some structures it exports match those exported by that library.
 
 If you require this module, you will get an object with the following members
 
@@ -63,7 +63,7 @@ function loadObject(reflectionObject)
 Returns the same structure that `load` returns, but takes a reflection object from `ProtoBuf.js` instead of a file name.
 
 ```javascript
-function Server([serverOpions])
+function Server([serverOptions])
 ```
 
 Constructs a server to which service/implementation pairs can be added.
diff --git a/src/objective-c/GRPCClient/GRPCCall.m b/src/objective-c/GRPCClient/GRPCCall.m
index 05a1d10f6d..eecda4c03a 100644
--- a/src/objective-c/GRPCClient/GRPCCall.m
+++ b/src/objective-c/GRPCClient/GRPCCall.m
@@ -103,6 +103,11 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
 
 @synthesize state = _state;
 
+// TODO(jcanizales): If grpc_init is idempotent, this should be changed from load to initialize.
++ (void)load {
+  grpc_init();
+}
+
 - (instancetype)init {
   return [self initWithHost:nil path:nil requestsWriter:nil];
 }
diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
index 97f6b89340..1339429660 100644
--- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
+++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
@@ -245,11 +245,6 @@
   }
 
   if (self = [super init]) {
-    static dispatch_once_t initialization;
-    dispatch_once(&initialization, ^{
-      grpc_init();
-    });
-
     // Each completion queue consumes one thread. There's a trade to be made between creating and
     // consuming too many threads and having contention of multiple calls in a single completion
     // queue. Currently we use a singleton queue.
diff --git a/src/php/ext/grpc/call.c b/src/php/ext/grpc/call.c
index 31c59fe5ad..3a49ea8708 100644
--- a/src/php/ext/grpc/call.c
+++ b/src/php/ext/grpc/call.c
@@ -69,8 +69,8 @@ PHP_GRPC_FREE_WRAPPED_FUNC_START(wrapped_grpc_call)
   }
 PHP_GRPC_FREE_WRAPPED_FUNC_END()
 
-/* Initializes an instance of wrapped_grpc_call to be associated with an object
- * of a class specified by class_type */
+/* Initializes an instance of wrapped_grpc_call to be associated with an
+ * object of a class specified by class_type */
 php_grpc_zend_object create_wrapped_grpc_call(zend_class_entry *class_type
                                               TSRMLS_DC) {
   PHP_GRPC_ALLOC_CLASS_OBJECT(wrapped_grpc_call);
@@ -195,10 +195,11 @@ zval *grpc_php_wrap_call(grpc_call *wrapped, bool owned TSRMLS_DC) {
 
 /**
  * Constructs a new instance of the Call class.
- * @param Channel $channel The channel to associate the call with. Must not be
- *     closed.
+ * @param Channel $channel_obj The channel to associate the call with.
+ *                             Must not be closed.
  * @param string $method The method to call
- * @param Timeval $absolute_deadline The deadline for completing the call
+ * @param Timeval $deadline_obj The deadline for completing the call
+ * @param string $host_override The host is set by user (optional)
  */
 PHP_METHOD(Call, __construct) {
   zval *channel_obj;
@@ -237,7 +238,7 @@ PHP_METHOD(Call, __construct) {
 
 /**
  * Start a batch of RPC actions.
- * @param array batch Array of actions to take
+ * @param array $array Array of actions to take
  * @return object Object with results of all actions
  */
 PHP_METHOD(Call, startBatch) {
@@ -515,8 +516,9 @@ PHP_METHOD(Call, getPeer) {
 }
 
 /**
- * Cancel the call. This will cause the call to end with STATUS_CANCELLED if it
- * has not already ended with another status.
+ * Cancel the call. This will cause the call to end with STATUS_CANCELLED
+ * if it has not already ended with another status.
+ * @return void
  */
 PHP_METHOD(Call, cancel) {
   wrapped_grpc_call *call = Z_WRAPPED_GRPC_CALL_P(getThis());
@@ -525,8 +527,8 @@ PHP_METHOD(Call, cancel) {
 
 /**
  * Set the CallCredentials for this call.
- * @param CallCredentials creds_obj The CallCredentials object
- * @param int The error code
+ * @param CallCredentials $creds_obj The CallCredentials object
+ * @return int The error code
  */
 PHP_METHOD(Call, setCredentials) {
   zval *creds_obj;
diff --git a/src/php/ext/grpc/call_credentials.c b/src/php/ext/grpc/call_credentials.c
index 25c92c91fe..3aafc3a19b 100644
--- a/src/php/ext/grpc/call_credentials.c
+++ b/src/php/ext/grpc/call_credentials.c
@@ -87,8 +87,8 @@ zval *grpc_php_wrap_call_credentials(grpc_call_credentials
 
 /**
  * Create composite credentials from two existing credentials.
- * @param CallCredentials cred1 The first credential
- * @param CallCredentials cred2 The second credential
+ * @param CallCredentials $cred1_obj The first credential
+ * @param CallCredentials $cred2_obj The second credential
  * @return CallCredentials The new composite credentials object
  */
 PHP_METHOD(CallCredentials, createComposite) {
@@ -119,7 +119,7 @@ PHP_METHOD(CallCredentials, createComposite) {
 
 /**
  * Create a call credentials object from the plugin API
- * @param function callback The callback function
+ * @param function $fci The callback function
  * @return CallCredentials The new call credentials object
  */
 PHP_METHOD(CallCredentials, createFromPlugin) {
diff --git a/src/php/ext/grpc/channel.c b/src/php/ext/grpc/channel.c
index b5a2c9f6ba..4ce4f307b0 100644
--- a/src/php/ext/grpc/channel.c
+++ b/src/php/ext/grpc/channel.c
@@ -125,7 +125,7 @@ void php_grpc_read_args_array(zval *args_array,
  * "credentials" key mapping to a ChannelCredentials object, a secure channel
  * will be created with those credentials.
  * @param string $target The hostname to associate with this channel
- * @param array $args The arguments to pass to the Channel (optional)
+ * @param array $args_array The arguments to pass to the Channel
  */
 PHP_METHOD(Channel, __construct) {
   wrapped_grpc_channel *channel = Z_WRAPPED_GRPC_CHANNEL_P(getThis());
@@ -182,7 +182,7 @@ PHP_METHOD(Channel, getTarget) {
 
 /**
  * Get the connectivity state of the channel
- * @param bool (optional) try to connect on the channel
+ * @param bool $try_to_connect Try to connect on the channel (optional)
  * @return long The grpc connectivity state
  */
 PHP_METHOD(Channel, getConnectivityState) {
@@ -202,8 +202,8 @@ PHP_METHOD(Channel, getConnectivityState) {
 
 /**
  * Watch the connectivity state of the channel until it changed
- * @param long The previous connectivity state of the channel
- * @param Timeval The deadline this function should wait until
+ * @param long $last_state The previous connectivity state of the channel
+ * @param Timeval $deadline_obj The deadline this function should wait until
  * @return bool If the connectivity state changes from last_state
  *              before deadline
  */
@@ -233,6 +233,7 @@ PHP_METHOD(Channel, watchConnectivityState) {
 
 /**
  * Close the channel
+ * @return void
  */
 PHP_METHOD(Channel, close) {
   wrapped_grpc_channel *channel = Z_WRAPPED_GRPC_CHANNEL_P(getThis());
diff --git a/src/php/ext/grpc/channel_credentials.c b/src/php/ext/grpc/channel_credentials.c
index 0b356aa25f..a32c4a4ea2 100644
--- a/src/php/ext/grpc/channel_credentials.c
+++ b/src/php/ext/grpc/channel_credentials.c
@@ -97,7 +97,7 @@ zval *grpc_php_wrap_channel_credentials(grpc_channel_credentials
 
 /**
  * Set default roots pem.
- * @param string pem_roots PEM encoding of the server root certificates
+ * @param string $pem_roots PEM encoding of the server root certificates
  * @return void
  */
 PHP_METHOD(ChannelCredentials, setDefaultRootsPem) {
@@ -129,11 +129,11 @@ PHP_METHOD(ChannelCredentials, createDefault) {
 
 /**
  * Create SSL credentials.
- * @param string pem_root_certs PEM encoding of the server root certificates
- * @param string pem_private_key PEM encoding of the client's private key
- *     (optional)
- * @param string pem_cert_chain PEM encoding of the client's certificate chain
- *     (optional)
+ * @param string $pem_root_certs PEM encoding of the server root certificates
+ * @param string $pem_key_cert_pair.private_key PEM encoding of the client's
+ *                                              private key (optional)
+ * @param string $pem_key_cert_pair.cert_chain PEM encoding of the client's
+ *                                             certificate chain (optional)
  * @return ChannelCredentials The new SSL credentials object
  */
 PHP_METHOD(ChannelCredentials, createSsl) {
@@ -168,8 +168,8 @@ PHP_METHOD(ChannelCredentials, createSsl) {
 
 /**
  * Create composite credentials from two existing credentials.
- * @param ChannelCredentials cred1 The first credential
- * @param CallCredentials cred2 The second credential
+ * @param ChannelCredentials $cred1_obj The first credential
+ * @param CallCredentials $cred2_obj The second credential
  * @return ChannelCredentials The new composite credentials object
  */
 PHP_METHOD(ChannelCredentials, createComposite) {
diff --git a/src/php/ext/grpc/server.c b/src/php/ext/grpc/server.c
index fc20c42b16..2217a4f9a8 100644
--- a/src/php/ext/grpc/server.c
+++ b/src/php/ext/grpc/server.c
@@ -72,8 +72,8 @@ PHP_GRPC_FREE_WRAPPED_FUNC_START(wrapped_grpc_server)
   }
 PHP_GRPC_FREE_WRAPPED_FUNC_END()
 
-/* Initializes an instance of wrapped_grpc_call to be associated with an object
- * of a class specified by class_type */
+/* Initializes an instance of wrapped_grpc_call to be associated with an
+ * object of a class specified by class_type */
 php_grpc_zend_object create_wrapped_grpc_server(zend_class_entry *class_type
                                                 TSRMLS_DC) {
   PHP_GRPC_ALLOC_CLASS_OBJECT(wrapped_grpc_server);
@@ -84,7 +84,7 @@ php_grpc_zend_object create_wrapped_grpc_server(zend_class_entry *class_type
 
 /**
  * Constructs a new instance of the Server class
- * @param array $args The arguments to pass to the server (optional)
+ * @param array $args_array The arguments to pass to the server (optional)
  */
 PHP_METHOD(Server, __construct) {
   wrapped_grpc_server *server = Z_WRAPPED_GRPC_SERVER_P(getThis());
@@ -116,7 +116,7 @@ PHP_METHOD(Server, __construct) {
  * Request a call on a server. Creates a single GRPC_SERVER_RPC_NEW event.
  * @param long $tag_new The tag to associate with the new request
  * @param long $tag_cancel The tag to use if the call is cancelled
- * @return Void
+ * @return void
  */
 PHP_METHOD(Server, requestCall) {
   grpc_call_error error_code;
@@ -180,7 +180,7 @@ PHP_METHOD(Server, requestCall) {
 /**
  * Add a http2 over tcp listener.
  * @param string $addr The address to add
- * @return true on success, false on failure
+ * @return bool True on success, false on failure
  */
 PHP_METHOD(Server, addHttp2Port) {
   const char *addr;
@@ -197,6 +197,12 @@ PHP_METHOD(Server, addHttp2Port) {
   RETURN_LONG(grpc_server_add_insecure_http2_port(server->wrapped, addr));
 }
 
+/**
+ * Add a secure http2 over tcp listener.
+ * @param string $addr The address to add
+ * @param ServerCredentials The ServerCredentials object
+ * @return bool True on success, false on failure
+ */
 PHP_METHOD(Server, addSecureHttp2Port) {
   const char *addr;
   php_grpc_int addr_len;
@@ -220,7 +226,7 @@ PHP_METHOD(Server, addSecureHttp2Port) {
 
 /**
  * Start a server - tells all listeners to start listening
- * @return Void
+ * @return void
  */
 PHP_METHOD(Server, start) {
   wrapped_grpc_server *server = Z_WRAPPED_GRPC_SERVER_P(getThis());
diff --git a/src/php/ext/grpc/server_credentials.c b/src/php/ext/grpc/server_credentials.c
index b05896af4a..1610c8ebb0 100644
--- a/src/php/ext/grpc/server_credentials.c
+++ b/src/php/ext/grpc/server_credentials.c
@@ -61,8 +61,8 @@ PHP_GRPC_FREE_WRAPPED_FUNC_START(wrapped_grpc_server_credentials)
   }
 PHP_GRPC_FREE_WRAPPED_FUNC_END()
 
-/* Initializes an instace of wrapped_grpc_server_credentials to be associated
- * with an object of a class specified by class_type */
+/* Initializes an instace of wrapped_grpc_server_credentials to be
+ * associated with an object of a class specified by class_type */
 php_grpc_zend_object create_wrapped_grpc_server_credentials(
     zend_class_entry *class_type TSRMLS_DC) {
   PHP_GRPC_ALLOC_CLASS_OBJECT(wrapped_grpc_server_credentials);
diff --git a/src/php/ext/grpc/timeval.c b/src/php/ext/grpc/timeval.c
index e145d96772..945231b47f 100644
--- a/src/php/ext/grpc/timeval.c
+++ b/src/php/ext/grpc/timeval.c
@@ -80,7 +80,7 @@ zval *grpc_php_wrap_timeval(gpr_timespec wrapped TSRMLS_DC) {
 
 /**
  * Constructs a new instance of the Timeval class
- * @param long $usec The number of microseconds in the interval
+ * @param long $microseconds The number of microseconds in the interval
  */
 PHP_METHOD(Timeval, __construct) {
   wrapped_grpc_timeval *timeval = Z_WRAPPED_GRPC_TIMEVAL_P(getThis());
@@ -100,7 +100,7 @@ PHP_METHOD(Timeval, __construct) {
 /**
  * Adds another Timeval to this one and returns the sum. Calculations saturate
  * at infinities.
- * @param Timeval $other The other Timeval object to add
+ * @param Timeval $other_obj The other Timeval object to add
  * @return Timeval A new Timeval object containing the sum
  */
 PHP_METHOD(Timeval, add) {
@@ -126,8 +126,8 @@ PHP_METHOD(Timeval, add) {
 /**
  * Subtracts another Timeval from this one and returns the difference.
  * Calculations saturate at infinities.
- * @param Timeval $other The other Timeval object to subtract
- * @param Timeval A new Timeval object containing the sum
+ * @param Timeval $other_obj The other Timeval object to subtract
+ * @return Timeval A new Timeval object containing the diff 
  */
 PHP_METHOD(Timeval, subtract) {
   zval *other_obj;
@@ -150,10 +150,10 @@ PHP_METHOD(Timeval, subtract) {
 }
 
 /**
- * Return negative, 0, or positive according to whether a < b, a == b, or a > b
- * respectively.
- * @param Timeval $a The first time to compare
- * @param Timeval $b The second time to compare
+ * Return negative, 0, or positive according to whether a < b, a == b,
+ * or a > b respectively.
+ * @param Timeval $a_obj The first time to compare
+ * @param Timeval $b_obj The second time to compare
  * @return long
  */
 PHP_METHOD(Timeval, compare) {
@@ -176,9 +176,9 @@ PHP_METHOD(Timeval, compare) {
 
 /**
  * Checks whether the two times are within $threshold of each other
- * @param Timeval $a The first time to compare
- * @param Timeval $b The second time to compare
- * @param Timeval $threshold The threshold to check against
+ * @param Timeval $a_obj The first time to compare
+ * @param Timeval $b_obj The second time to compare
+ * @param Timeval $thresh_obj The threshold to check against
  * @return bool True if $a and $b are within $threshold, False otherwise
  */
 PHP_METHOD(Timeval, similar) {
diff --git a/src/php/lib/Grpc/BaseStub.php b/src/php/lib/Grpc/BaseStub.php
index 2fec1bd9cc..d850eebc78 100644
--- a/src/php/lib/Grpc/BaseStub.php
+++ b/src/php/lib/Grpc/BaseStub.php
@@ -41,6 +41,7 @@ namespace Grpc;
 class BaseStub
 {
     private $hostname;
+    private $hostname_override;
     private $channel;
 
     // a callback function
@@ -75,6 +76,9 @@ class BaseStub
         } else {
             $opts['grpc.primary_user_agent'] = '';
         }
+        if (!empty($opts['grpc.ssl_target_name_override'])) {
+            $this->hostname_override = $opts['grpc.ssl_target_name_override'];
+        }
         $opts['grpc.primary_user_agent'] .=
             'grpc-php/'.$package_config['version'];
         if (!array_key_exists('credentials', $opts)) {
@@ -173,7 +177,12 @@ class BaseStub
         }
         $service_name = substr($method, 0, $last_slash_idx);
 
-        return 'https://'.$this->hostname.$service_name;
+        if ($this->hostname_override) {
+            $hostname = $this->hostname_override;
+        } else {
+            $hostname = $this->hostname;
+        }
+        return 'https://'.$hostname.$service_name;
     }
 
     /**
diff --git a/src/php/tests/interop/interop_client.php b/src/php/tests/interop/interop_client.php
index c94ba61296..94ceeda02c 100755
--- a/src/php/tests/interop/interop_client.php
+++ b/src/php/tests/interop/interop_client.php
@@ -108,7 +108,7 @@ function performLargeUnary($stub, $fillUsername = false, $fillOauthScope = false
     $request->setFillUsername($fillUsername);
     $request->setFillOauthScope($fillOauthScope);
 
-    $options = false;
+    $options = [];
     if ($callback) {
         $options['call_credentials_callback'] = $callback;
     }
diff --git a/src/proto/grpc/testing/echo.proto b/src/proto/grpc/testing/echo.proto
index c596aabfcc..ca60a41b4f 100644
--- a/src/proto/grpc/testing/echo.proto
+++ b/src/proto/grpc/testing/echo.proto
@@ -42,7 +42,7 @@ service EchoTestService {
   rpc Unimplemented(EchoRequest) returns (EchoResponse);
 }
 
-service UnimplementedService {
+service UnimplementedEchoService {
   rpc Unimplemented(EchoRequest) returns (EchoResponse);
 }
 
diff --git a/src/python/grpcio/grpc/__init__.py b/src/python/grpcio/grpc/__init__.py
index 513839df7d..faf3ab5f0d 100644
--- a/src/python/grpcio/grpc/__init__.py
+++ b/src/python/grpcio/grpc/__init__.py
@@ -1078,7 +1078,7 @@ def access_token_call_credentials(access_token):
 
   Args:
     access_token: A string to place directly in the http request
-      authorization header, ie "Authorization: Bearer <access_token>".
+      authorization header, ie "authorization: Bearer <access_token>".
 
   Returns:
     A CallCredentials.
@@ -1193,7 +1193,7 @@ def insecure_channel(target, options=None):
 
 
 def secure_channel(target, credentials, options=None):
-  """Creates an insecure Channel to a server.
+  """Creates a secure Channel to a server.
 
   Args:
     target: The target to which to connect.
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 725134c3a4..be7f30c29b 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -51,6 +51,7 @@ CORE_SOURCE_FILES = [
   'src/core/lib/support/log_posix.c',
   'src/core/lib/support/log_windows.c',
   'src/core/lib/support/murmur_hash.c',
+  'src/core/lib/support/percent_encoding.c',
   'src/core/lib/support/slice.c',
   'src/core/lib/support/slice_buffer.c',
   'src/core/lib/support/stack_lockfree.c',
diff --git a/src/python/grpcio_tests/setup.py b/src/python/grpcio_tests/setup.py
index 3524355cbf..7384206602 100644
--- a/src/python/grpcio_tests/setup.py
+++ b/src/python/grpcio_tests/setup.py
@@ -31,13 +31,9 @@
 
 import os
 import os.path
-import shutil
 import sys
 
-from distutils import core as _core
-from distutils import extension as _extension
 import setuptools
-from setuptools.command import egg_info
 
 import grpc.tools.command
 
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index 6d65db8306..66c54aa3e0 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -91,6 +91,10 @@ if grpc_config == 'gcov'
   $LDFLAGS << ' -fprofile-arcs -ftest-coverage -rdynamic'
 end
 
+if grpc_config == 'dbg'
+  $CFLAGS << ' -O0'
+end
+
 $LDFLAGS << ' -Wl,-wrap,memcpy' if RUBY_PLATFORM =~ /linux/
 $LDFLAGS << ' -static' if windows
 
diff --git a/src/ruby/lib/grpc/grpc.rb b/src/ruby/lib/grpc/grpc.rb
index b60a828d66..f46710dc74 100644
--- a/src/ruby/lib/grpc/grpc.rb
+++ b/src/ruby/lib/grpc/grpc.rb
@@ -28,7 +28,12 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 begin
-  require_relative "#{RUBY_VERSION.sub(/\.\d$/, '')}/grpc_c"
-rescue LoadError
-  require_relative 'grpc_c'
+  ruby_version_dirname = /(\d+\.\d+)/.match(RUBY_VERSION).to_s
+  distrib_lib_dir = File.expand_path(ruby_version_dirname,
+                                     File.dirname(__FILE__))
+  if File.directory?(distrib_lib_dir)
+    require_relative "#{distrib_lib_dir}/grpc_c"
+  else
+    require_relative 'grpc_c'
+  end
 end