23 files changed, 344 insertions, 17 deletions
diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 4052ec8398..3805f4759e 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.1.0-dev",
+  "version": "1.2.0-dev",
   "title": "gRPC C# Auth",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
@@ -21,7 +21,7 @@
     }
   },
   "dependencies": {
-    "Grpc.Core": "1.1.0-dev",
+    "Grpc.Core": "1.2.0-dev",
     "Google.Apis.Auth": "1.16.0"
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.Core.Testing/.gitignore b/src/csharp/Grpc.Core.Testing/.gitignore
new file mode 100644
index 0000000000..1746e3269e
--- /dev/null
+++ b/src/csharp/Grpc.Core.Testing/.gitignore
@@ -0,0 +1,2 @@
+bin
+obj
diff --git a/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.csproj b/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.csproj
new file mode 100644
index 0000000000..9b0b3abf10
--- /dev/null
+++ b/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.csproj
@@ -0,0 +1,68 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{3AB047CA-6CF9-435D-AA61-2D86C6FA2457}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Grpc.Core.Testing</RootNamespace>
+    <AssemblyName>Grpc.Core.Testing</AssemblyName>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <DocumentationFile>bin\$(Configuration)\Grpc.Core.Testing.Xml</DocumentationFile>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Interactive.Async">
+      <HintPath>..\packages\System.Interactive.Async.3.1.1\lib\net45\System.Interactive.Async.dll</HintPath>
+    </Reference>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="..\Grpc.Core\Version.cs">
+      <Link>Version.cs</Link>
+    </Compile>
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="TestCalls.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Grpc.Core.Testing.project.json" />
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Grpc.Core\Grpc.Core.csproj">
+      <Project>{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}</Project>
+      <Name>Grpc.Core</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>
+\ No newline at end of file
diff --git a/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.project.json b/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.project.json
new file mode 100644
index 0000000000..c2f5bcb163
--- /dev/null
+++ b/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.xproj b/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.xproj
new file mode 100644
index 0000000000..c972387003
--- /dev/null
+++ b/src/csharp/Grpc.Core.Testing/Grpc.Core.Testing.xproj
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>2b372155-80ba-4cf9-82d6-4b938e8ec3a0</ProjectGuid>
+    <RootNamespace>Grpc.Core.Testing</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
+  </PropertyGroup>
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
+\ No newline at end of file
diff --git a/src/csharp/Grpc.Core.Testing/Properties/AssemblyInfo.cs b/src/csharp/Grpc.Core.Testing/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000000..d3ca0c4d0e
--- /dev/null
+++ b/src/csharp/Grpc.Core.Testing/Properties/AssemblyInfo.cs
@@ -0,0 +1,44 @@
+#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.Reflection;
+using System.Runtime.CompilerServices;
+
+[assembly: AssemblyTitle("Grpc.Core.Testing")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("")]
+[assembly: AssemblyCopyright("Google Inc.  All rights reserved.")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
diff --git a/src/csharp/Grpc.Core.Testing/Settings.StyleCop b/src/csharp/Grpc.Core.Testing/Settings.StyleCop
new file mode 100644
index 0000000000..2942add962
--- /dev/null
+++ b/src/csharp/Grpc.Core.Testing/Settings.StyleCop
@@ -0,0 +1,10 @@
+<StyleCopSettings Version="105">
+  <SourceFileList>
+    <SourceFile>Health.cs</SourceFile>
+    <Settings>
+    <GlobalSettings>
+      <BooleanProperty Name="RulesEnabledByDefault">False</BooleanProperty>
+    </GlobalSettings>
+    </Settings>
+  </SourceFileList>
+</StyleCopSettings>
diff --git a/src/csharp/Grpc.Core.Testing/TestCalls.cs b/src/csharp/Grpc.Core.Testing/TestCalls.cs
new file mode 100644
index 0000000000..d8c36f22f3
--- /dev/null
+++ b/src/csharp/Grpc.Core.Testing/TestCalls.cs
@@ -0,0 +1,91 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Threading.Tasks;
+using Grpc.Core;
+
+namespace Grpc.Core.Testing
+{
+    /// <summary>
+    /// Test doubles for client-side call objects.
+    /// </summary>
+    public static class TestCalls
+    {
+        /// <summary>
+        /// Creates a test double for <c>AsyncUnaryCall</c>. Only for testing.
+        /// Note: experimental API that can change or be removed without any prior notice.
+        /// </summary>
+        public static AsyncUnaryCall<TResponse> AsyncUnaryCall<TResponse> (
+            Task<TResponse> responseAsync, Task<Metadata> responseHeadersAsync, Func<Status> getStatusFunc,
+            Func<Metadata> getTrailersFunc, Action disposeAction)
+        {
+            return new AsyncUnaryCall<TResponse>(responseAsync, responseHeadersAsync, getStatusFunc, getTrailersFunc, disposeAction);
+        }
+
+        /// <summary>
+        /// Creates a test double for <c>AsyncClientStreamingCall</c>. Only for testing.
+        /// Note: experimental API that can change or be removed without any prior notice.
+        /// </summary>
+        public static AsyncClientStreamingCall<TRequest, TResponse> AsyncClientStreamingCall<TRequest, TResponse>(
+            IClientStreamWriter<TRequest> requestStream, Task<TResponse> responseAsync,
+            Task<Metadata> responseHeadersAsync, Func<Status> getStatusFunc,
+            Func<Metadata> getTrailersFunc, Action disposeAction)
+        {
+            return new AsyncClientStreamingCall<TRequest, TResponse>(requestStream, responseAsync, responseHeadersAsync, getStatusFunc, getTrailersFunc, disposeAction);
+        }
+
+        /// <summary>
+        /// Creates a test double for <c>AsyncServerStreamingCall</c>. Only for testing.
+        /// Note: experimental API that can change or be removed without any prior notice.
+        /// </summary>
+        public static AsyncServerStreamingCall<TResponse> AsyncServerStreamingCall<TResponse>(
+            IAsyncStreamReader<TResponse> responseStream, Task<Metadata> responseHeadersAsync, 
+            Func<Status> getStatusFunc, Func<Metadata> getTrailersFunc, Action disposeAction)
+        {
+            return new AsyncServerStreamingCall<TResponse>(responseStream, responseHeadersAsync, getStatusFunc, getTrailersFunc, disposeAction);
+        }
+
+        /// <summary>
+        /// Creates a test double for <c>AsyncDuplexStreamingCall</c>. Only for testing.
+        /// Note: experimental API that can change or be removed without any prior notice.
+        /// </summary>
+        public static AsyncDuplexStreamingCall<TRequest, TResponse> AsyncDuplexStreamingCall<TResponse, TRequest>(
+            IClientStreamWriter<TRequest> requestStream, IAsyncStreamReader<TResponse> responseStream,
+            Task<Metadata> responseHeadersAsync, Func<Status> getStatusFunc,
+            Func<Metadata> getTrailersFunc, Action disposeAction)
+        {
+            return new AsyncDuplexStreamingCall<TRequest, TResponse>(requestStream, responseStream, responseHeadersAsync, getStatusFunc, getTrailersFunc, disposeAction);
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core.Testing/packages.config b/src/csharp/Grpc.Core.Testing/packages.config
new file mode 100644
index 0000000000..53cfad52f0
--- /dev/null
+++ b/src/csharp/Grpc.Core.Testing/packages.config
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="System.Interactive.Async" version="3.1.1" targetFramework="net45" />
+</packages>
+\ No newline at end of file
diff --git a/src/csharp/Grpc.Core.Testing/project.json b/src/csharp/Grpc.Core.Testing/project.json
new file mode 100644
index 0000000000..02be957812
--- /dev/null
+++ b/src/csharp/Grpc.Core.Testing/project.json
@@ -0,0 +1,39 @@
+{
+  "version": "1.2.0-dev",
+  "title": "gRPC C# Core Testing",
+  "authors": [ "Google Inc." ],
+  "copyright": "Copyright 2017, Google Inc.",
+  "packOptions": {
+    "summary": "Testing support for gRPC C#",
+    "description": "Useful when testing code that uses gRPC.",
+    "owners": [ "grpc-packages" ],
+    "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
+    "projectUrl": "https://github.com/grpc/grpc",
+    "requireLicenseAcceptance": false,
+    "tags": [ "gRPC test testing" ]
+  },
+  "buildOptions": {
+    "define": [ "SIGNED" ],
+    "keyFile": "../keys/Grpc.snk",
+    "xmlDoc": true,
+    "compile": {
+      "includeFiles": [ "../Grpc.Core/Version.cs" ]
+    }
+  },
+  "dependencies": {
+    "Grpc.Core": "1.2.0-dev"
+  },
+  "frameworks": {
+    "net45": {
+      "frameworkAssemblies": {
+        "System.Runtime": "",
+        "System.IO": ""
+      }
+    },
+    "netstandard1.5": {
+      "dependencies": {
+        "NETStandard.Library": "1.6.0"
+      }
+    }
+  }
+}
diff --git a/src/csharp/Grpc.Core.Tests/ClientServerTest.cs b/src/csharp/Grpc.Core.Tests/ClientServerTest.cs
index dcdddc769e..6bf9756962 100644
--- a/src/csharp/Grpc.Core.Tests/ClientServerTest.cs
+++ b/src/csharp/Grpc.Core.Tests/ClientServerTest.cs
@@ -336,6 +336,22 @@ namespace Grpc.Core.Tests
         }
 
         [Test]
+        public void StatusDetailIsUtf8()
+        {
+            // some japanese and chinese characters
+            var nonAsciiString = "\u30a1\u30a2\u30a3 \u62b5\u6297\u662f\u5f92\u52b3\u7684";
+            helper.UnaryHandler = new UnaryServerMethod<string, string>(async (request, context) =>
+            {
+                context.Status = new Status(StatusCode.Unknown, nonAsciiString);
+                return "";
+            });
+
+            var ex = Assert.Throws<RpcException>(() => Calls.BlockingUnaryCall(helper.CreateUnaryCall(), "abc"));
+            Assert.AreEqual(StatusCode.Unknown, ex.Status.StatusCode);
+            Assert.AreEqual(nonAsciiString, ex.Status.Detail);
+        }
+
+        [Test]
         public void ServerCallContext_PeerInfoPresent()
         {
             helper.UnaryHandler = new UnaryServerMethod<string, string>(async (request, context) =>
diff --git a/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs b/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs
index 0e4a77be81..efae149f09 100644
--- a/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs
@@ -33,6 +33,7 @@
 
 using System;
 using System.Runtime.InteropServices;
+using System.Text;
 using Grpc.Core;
 
 namespace Grpc.Core.Internal
@@ -42,6 +43,7 @@ namespace Grpc.Core.Internal
     /// </summary>
     internal class BatchContextSafeHandle : SafeHandleZeroIsInvalid
     {
+        static readonly Encoding EncodingUTF8 = System.Text.Encoding.UTF8;
         static readonly NativeMethods Native = NativeMethods.Get();
 
         private BatchContextSafeHandle()
@@ -73,7 +75,7 @@ namespace Grpc.Core.Internal
         {
             UIntPtr detailsLength;
             IntPtr detailsPtr = Native.grpcsharp_batch_context_recv_status_on_client_details(this, out detailsLength);
-            string details = Marshal.PtrToStringAnsi(detailsPtr, (int) detailsLength.ToUInt32());
+            string details = PtrToStringUtf8(detailsPtr, (int) detailsLength.ToUInt32());
             var status = new Status(Native.grpcsharp_batch_context_recv_status_on_client_status(this), details);
 
             IntPtr metadataArrayPtr = Native.grpcsharp_batch_context_recv_status_on_client_trailing_metadata(this);
@@ -106,5 +108,12 @@ namespace Grpc.Core.Internal
             Native.grpcsharp_batch_context_destroy(handle);
             return true;
         }
+
+        string PtrToStringUtf8(IntPtr ptr, int len)
+        {
+            var bytes = new byte[len];
+            Marshal.Copy(ptr, bytes, 0, len);
+            return EncodingUTF8.GetString(bytes);
+        }
     }
 }
diff --git a/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs b/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
index 6bfcc7fa74..710ca480e8 100644
--- a/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
@@ -32,6 +32,7 @@
 using System;
 using System.Diagnostics;
 using System.Runtime.InteropServices;
+using System.Text;
 using Grpc.Core;
 using Grpc.Core.Utils;
 using Grpc.Core.Profiling;
@@ -44,6 +45,7 @@ namespace Grpc.Core.Internal
     internal class CallSafeHandle : SafeHandleZeroIsInvalid, INativeCall
     {
         public static readonly CallSafeHandle NullInstance = new CallSafeHandle();
+        static readonly Encoding EncodingUTF8 = System.Text.Encoding.UTF8;
         static readonly NativeMethods Native = NativeMethods.Get();
 
         const uint GRPC_WRITE_BUFFER_HINT = 1;
@@ -138,7 +140,8 @@ namespace Grpc.Core.Internal
                 var ctx = BatchContextSafeHandle.Create();
                 var optionalPayloadLength = optionalPayload != null ? new UIntPtr((ulong)optionalPayload.Length) : UIntPtr.Zero;
                 completionQueue.CompletionRegistry.RegisterBatchCompletion(ctx, (success, context) => callback(success));
-                Native.grpcsharp_call_send_status_from_server(this, ctx, status.StatusCode, status.Detail, metadataArray, sendEmptyInitialMetadata,
+                var statusDetailBytes = EncodingUTF8.GetBytes(status.Detail);
+                Native.grpcsharp_call_send_status_from_server(this, ctx, status.StatusCode, statusDetailBytes, new UIntPtr((ulong)statusDetailBytes.Length), metadataArray, sendEmptyInitialMetadata,
                     optionalPayload, optionalPayloadLength, writeFlags).CheckOk();
             }
         }
diff --git a/src/csharp/Grpc.Core/Internal/NativeMethods.cs b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
index 2f377071f7..aff9550e8d 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMethods.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
@@ -336,7 +336,7 @@ namespace Grpc.Core.Internal
             public delegate CallError grpcsharp_call_send_close_from_client_delegate(CallSafeHandle call,
                 BatchContextSafeHandle ctx);
             public delegate CallError grpcsharp_call_send_status_from_server_delegate(CallSafeHandle call,
-                BatchContextSafeHandle ctx, StatusCode statusCode, string statusMessage, MetadataArraySafeHandle metadataArray, bool sendEmptyInitialMetadata,
+                BatchContextSafeHandle ctx, StatusCode statusCode, byte[] statusMessage, UIntPtr statusMessageLen, MetadataArraySafeHandle metadataArray, bool sendEmptyInitialMetadata,
                 byte[] optionalSendBuffer, UIntPtr optionalSendBufferLen, WriteFlags writeFlags);
             public delegate CallError grpcsharp_call_recv_message_delegate(CallSafeHandle call,
                 BatchContextSafeHandle ctx);
diff --git a/src/csharp/Grpc.Core/Properties/AssemblyInfo.cs b/src/csharp/Grpc.Core/Properties/AssemblyInfo.cs
index 99158fbc8b..77ac347c7d 100644
--- a/src/csharp/Grpc.Core/Properties/AssemblyInfo.cs
+++ b/src/csharp/Grpc.Core/Properties/AssemblyInfo.cs
@@ -49,6 +49,11 @@ using System.Runtime.CompilerServices;
     "0442bb8e12768722de0b0cb1b15e955b32a11352740ee59f2c94c48edc8e177d1052536b8ac651bce11ce5da3a" +
     "27fc95aff3dc604a6971417453f9483c7b5e836756d5b271bf8f2403fe186e31956148c03d804487cf642f8cc0" +
     "71394ee9672dfe5b55ea0f95dfd5a7f77d22c962ccf51320d3")]
+[assembly: InternalsVisibleTo("Grpc.Core.Testing,PublicKey=" +
+    "00240000048000009400000006020000002400005253413100040000010001002f5797a92c6fcde81bd4098f43" +
+    "0442bb8e12768722de0b0cb1b15e955b32a11352740ee59f2c94c48edc8e177d1052536b8ac651bce11ce5da3a" +
+    "27fc95aff3dc604a6971417453f9483c7b5e836756d5b271bf8f2403fe186e31956148c03d804487cf642f8cc0" +
+    "71394ee9672dfe5b55ea0f95dfd5a7f77d22c962ccf51320d3")]
 [assembly: InternalsVisibleTo("Grpc.IntegrationTesting,PublicKey=" +
     "00240000048000009400000006020000002400005253413100040000010001002f5797a92c6fcde81bd4098f43" +
     "0442bb8e12768722de0b0cb1b15e955b32a11352740ee59f2c94c48edc8e177d1052536b8ac651bce11ce5da3a" +
@@ -56,5 +61,6 @@ using System.Runtime.CompilerServices;
     "71394ee9672dfe5b55ea0f95dfd5a7f77d22c962ccf51320d3")]
 #else
 [assembly: InternalsVisibleTo("Grpc.Core.Tests")]
+[assembly: InternalsVisibleTo("Grpc.Core.Testing")]
 [assembly: InternalsVisibleTo("Grpc.IntegrationTesting")]
 #endif
diff --git a/src/csharp/Grpc.Core/VersionInfo.cs b/src/csharp/Grpc.Core/VersionInfo.cs
index 553aeec58a..f01a024db4 100644
--- a/src/csharp/Grpc.Core/VersionInfo.cs
+++ b/src/csharp/Grpc.Core/VersionInfo.cs
@@ -48,11 +48,11 @@ namespace Grpc.Core
         /// <summary>
         /// Current <c>AssemblyFileVersion</c> of gRPC C# assemblies
         /// </summary>
-        public const string CurrentAssemblyFileVersion = "1.1.0.0";
+        public const string CurrentAssemblyFileVersion = "1.2.0.0";
 
         /// <summary>
         /// Current version of gRPC C#
         /// </summary>
-        public const string CurrentVersion = "1.1.0-dev";
+        public const string CurrentVersion = "1.2.0-dev";
     }
 }
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index 4405ecc5a2..0e37ec8927 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.1.0-dev",
+  "version": "1.2.0-dev",
   "title": "gRPC C# Core",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index 8f1237d003..5d3b2f554b 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.1.0-dev",
+  "version": "1.2.0-dev",
   "title": "gRPC C# Healthchecking",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
@@ -21,7 +21,7 @@
     }
   },
   "dependencies": {
-    "Grpc.Core": "1.1.0-dev",
+    "Grpc.Core": "1.2.0-dev",
     "Google.Protobuf": "3.0.0"
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.Reflection/project.json b/src/csharp/Grpc.Reflection/project.json
index 2fe617cc7a..bfc57661eb 100644
--- a/src/csharp/Grpc.Reflection/project.json
+++ b/src/csharp/Grpc.Reflection/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.1.0-dev",
+  "version": "1.2.0-dev",
   "title": "gRPC C# Reflection",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2016, Google Inc.",
@@ -21,7 +21,7 @@
     }
   },
   "dependencies": {
-    "Grpc.Core": "1.1.0-dev",
+    "Grpc.Core": "1.2.0-dev",
     "Google.Protobuf": "3.0.0"
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.sln b/src/csharp/Grpc.sln
index 179e731380..84ba46047f 100644
--- a/src/csharp/Grpc.sln
+++ b/src/csharp/Grpc.sln
@@ -40,6 +40,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.Reflection", "Grpc.Ref
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.Reflection.Tests", "Grpc.Reflection.Tests\Grpc.Reflection.Tests.csproj", "{B88F91D6-436D-4C78-8B99-47800FA8DE03}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.Core.Testing", "Grpc.Core.Testing\Grpc.Core.Testing.csproj", "{3AB047CA-6CF9-435D-AA61-2D86C6FA2457}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -110,6 +112,10 @@ Global
 		{F8C6D937-C44B-4EE3-A431-B0FBAEACE47D}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{F8C6D937-C44B-4EE3-A431-B0FBAEACE47D}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{F8C6D937-C44B-4EE3-A431-B0FBAEACE47D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3AB047CA-6CF9-435D-AA61-2D86C6FA2457}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3AB047CA-6CF9-435D-AA61-2D86C6FA2457}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3AB047CA-6CF9-435D-AA61-2D86C6FA2457}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3AB047CA-6CF9-435D-AA61-2D86C6FA2457}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 	EndGlobalSection
diff --git a/src/csharp/build_packages_dotnetcli.bat b/src/csharp/build_packages_dotnetcli.bat
index 9e8c045a1f..b99fdcbdfd 100755
--- a/src/csharp/build_packages_dotnetcli.bat
+++ b/src/csharp/build_packages_dotnetcli.bat
@@ -28,7 +28,7 @@
 @rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 @rem Current package versions
-set VERSION=1.1.0-dev
+set VERSION=1.2.0-dev
 set PROTOBUF_VERSION=3.0.0
 
 @rem Adjust the location of nuget.exe
@@ -59,6 +59,7 @@ xcopy /Y /I ..\..\architecture=x64,language=protoc,platform=macos\artifacts\* pr
 %DOTNET% restore . || goto :error
 
 %DOTNET% pack --configuration Release Grpc.Core\project.json --output ..\..\artifacts || goto :error
+%DOTNET% pack --configuration Release Grpc.Core.Testing\project.json --output ..\..\artifacts || goto :error
 %DOTNET% pack --configuration Release Grpc.Auth\project.json --output ..\..\artifacts || goto :error
 %DOTNET% pack --configuration Release Grpc.HealthCheck\project.json --output ..\..\artifacts || goto :error
 %DOTNET% pack --configuration Release Grpc.Reflection\project.json --output ..\..\artifacts || goto :error
diff --git a/src/csharp/build_packages_dotnetcli.sh b/src/csharp/build_packages_dotnetcli.sh
index 52cf2f9ddc..442e3acad2 100755
--- a/src/csharp/build_packages_dotnetcli.sh
+++ b/src/csharp/build_packages_dotnetcli.sh
@@ -61,11 +61,12 @@ cp $EXTERNAL_GIT_ROOT/architecture=x64,language=protoc,platform=macos/artifacts/
 dotnet restore .
 
 dotnet pack --configuration Release Grpc.Core/project.json --output ../../artifacts
+dotnet pack --configuration Release Grpc.Core.Testing/project.json --output ../../artifacts
 dotnet pack --configuration Release Grpc.Auth/project.json --output ../../artifacts
 dotnet pack --configuration Release Grpc.HealthCheck/project.json --output ../../artifacts
 dotnet pack --configuration Release Grpc.Reflection/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
+nuget pack Grpc.nuspec -Version "1.2.0-dev" -OutputDirectory ../../artifacts
+nuget pack Grpc.Tools.nuspec -Version "1.2.0-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 e308b0229c..e1f4d7cdf3 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -734,14 +734,15 @@ grpcsharp_call_send_close_from_client(grpc_call *call,
 
 GPR_EXPORT grpc_call_error GPR_CALLTYPE grpcsharp_call_send_status_from_server(
     grpc_call *call, grpcsharp_batch_context *ctx, grpc_status_code status_code,
-    const char *status_details, grpc_metadata_array *trailing_metadata,
+    const char *status_details, size_t status_details_len,
+    grpc_metadata_array *trailing_metadata,
     int32_t send_empty_initial_metadata, const char* optional_send_buffer,
     size_t optional_send_buffer_len, uint32_t write_flags) {
   /* TODO: don't use magic number */
   grpc_op ops[3];
   memset(ops, 0, sizeof(ops));
   size_t nops = 1;
-  grpc_slice status_details_slice = grpc_slice_from_copied_string(status_details);
+  grpc_slice status_details_slice = grpc_slice_from_copied_buffer(status_details, status_details_len);
   ops[0].op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   ops[0].data.send_status_from_server.status = status_code;
   ops[0].data.send_status_from_server.status_details = &status_details_slice;