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diff --git a/src/csharp/Grpc.IntegrationTesting/GeneratedServiceBaseTest.cs b/src/csharp/Grpc.IntegrationTesting/GeneratedServiceBaseTest.cs
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+#region Copyright notice and license
+
+// Copyright 2015-2016, 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.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Utils;
+using Grpc.Testing;
+using Moq;
+using NUnit.Framework;
+
+namespace Grpc.IntegrationTesting
+{
+    public class GeneratedServiceBaseTest
+    {
+        const string Host = "localhost";
+        Server server;
+        Channel channel;
+        TestService.TestServiceClient client;
+
+        [SetUp]
+        public void Init()
+        {
+            server = new Server
+            {
+                Services = { TestService.BindService(new UnimplementedTestServiceImpl()) },
+                Ports = { { Host, ServerPort.PickUnused, SslServerCredentials.Insecure } }
+            };
+            server.Start();
+            channel = new Channel(Host, server.Ports.Single().BoundPort, ChannelCredentials.Insecure);
+            client = TestService.NewClient(channel);
+        }
+
+        [TearDown]
+        public void Cleanup()
+        {
+            channel.ShutdownAsync().Wait();
+            server.ShutdownAsync().Wait();
+        }
+
+        [Test]
+        public void UnimplementedByDefault_Unary()
+        {
+            var ex = Assert.Throws<RpcException>(() => client.UnaryCall(new SimpleRequest { }));
+            Assert.AreEqual(StatusCode.Unimplemented, ex.Status.StatusCode);
+        }
+
+        [Test]
+        public async Task UnimplementedByDefault_ClientStreaming()
+        {
+            var call = client.StreamingInputCall();
+
+            var ex = Assert.Throws<RpcException>(async () => await call);
+            Assert.AreEqual(StatusCode.Unimplemented, ex.Status.StatusCode);
+        }
+
+        [Test]
+        public async Task UnimplementedByDefault_ServerStreamingCall()
+        {
+            var call = client.StreamingOutputCall(new StreamingOutputCallRequest());
+
+            var ex = Assert.Throws<RpcException>(async () => await call.ResponseStream.MoveNext());
+            Assert.AreEqual(StatusCode.Unimplemented, ex.Status.StatusCode);
+        }
+
+        [Test]
+        public async Task UnimplementedByDefault_DuplexStreamingCall()
+        {
+            var call = client.FullDuplexCall();
+
+            var ex = Assert.Throws<RpcException>(async () => await call.ResponseStream.MoveNext());
+            Assert.AreEqual(StatusCode.Unimplemented, ex.Status.StatusCode);
+        }
+
+        /// <summary>
+        /// Implementation of TestService that doesn't override any methods.
+        /// </summary>
+        private class UnimplementedTestServiceImpl : TestService.TestServiceBase
+        {
+        }
+    }
+}