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diff --git a/src/csharp/Grpc.Core.Tests/ClientServerTest.cs b/src/csharp/Grpc.Core.Tests/ClientServerTest.cs
new file mode 100644
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+++ b/src/csharp/Grpc.Core.Tests/ClientServerTest.cs
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+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Diagnostics;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+using NUnit.Framework;
+
+namespace Grpc.Core.Tests
+{
+    public class ClientServerTest
+    {
+        string host = "localhost";
+
+        Method<string, string> unaryEchoStringMethod = new Method<string, string>(
+            MethodType.Unary,
+            "/tests.Test/UnaryEchoString",
+            Marshallers.StringMarshaller,
+            Marshallers.StringMarshaller);
+
+        [TestFixtureSetUp]
+        public void Init()
+        {
+            GrpcEnvironment.Initialize();
+        }
+
+        [TestFixtureTearDown]
+        public void Cleanup()
+        {
+            GrpcEnvironment.Shutdown();
+        }
+
+        [Test]
+        public void UnaryCall()
+        {
+            Server server = new Server();
+            server.AddServiceDefinition(
+                ServerServiceDefinition.CreateBuilder("someService")
+                    .AddMethod(unaryEchoStringMethod, HandleUnaryEchoString).Build());
+
+            int port = server.AddPort(host + ":0");
+            server.Start();
+
+            using (Channel channel = new Channel(host + ":" + port))
+            {
+                var call = new Call<string, string>(unaryEchoStringMethod, channel);
+
+                Assert.AreEqual("ABC", Calls.BlockingUnaryCall(call, "ABC", default(CancellationToken)));
+
+                Assert.AreEqual("abcdef", Calls.BlockingUnaryCall(call, "abcdef", default(CancellationToken)));
+            }
+
+            server.ShutdownAsync().Wait();
+        }
+
+        [Test]
+        public void UnaryCallPerformance()
+        {
+            Server server = new Server();
+            server.AddServiceDefinition(
+                ServerServiceDefinition.CreateBuilder("someService")
+                .AddMethod(unaryEchoStringMethod, HandleUnaryEchoString).Build());
+
+            int port = server.AddPort(host + ":0");
+            server.Start();
+
+            using (Channel channel = new Channel(host + ":" + port))
+            {
+                var call = new Call<string, string>(unaryEchoStringMethod, channel);
+
+                var stopwatch = new Stopwatch();
+                stopwatch.Start();
+                for (int i = 0; i < 1000; i++)
+                {
+                    Calls.BlockingUnaryCall(call, "ABC", default(CancellationToken));
+                }
+                stopwatch.Stop();
+                Console.WriteLine("Elapsed time: " + stopwatch.ElapsedMilliseconds + "ms");
+            }
+
+            server.ShutdownAsync().Wait();
+        }
+
+        [Test]
+        public void UnknownMethodHandler()
+        {
+            Server server = new Server();
+            server.AddServiceDefinition(
+                ServerServiceDefinition.CreateBuilder("someService").Build());
+
+            int port = server.AddPort(host + ":0");
+            server.Start();
+
+            using (Channel channel = new Channel(host + ":" + port))
+            {
+                var call = new Call<string, string>(unaryEchoStringMethod, channel);
+
+                try {
+                    Calls.BlockingUnaryCall(call, "ABC", default(CancellationToken));
+                    Assert.Fail();
+                } catch(RpcException e) {
+                    Assert.AreEqual(StatusCode.Unimplemented, e.Status.StatusCode);
+                }
+            }
+
+            server.ShutdownAsync().Wait();
+        }
+
+        private void HandleUnaryEchoString(string request, IObserver<string> responseObserver)
+        {
+            responseObserver.OnNext(request);
+            responseObserver.OnCompleted();
+        }
+    }
+}
+