added C# interop server
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
new file mode 100644
index 0000000..73c9f2d
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+ <PropertyGroup>
+ <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+ <Platform Condition=" '$(Platform)' == '' ">x86</Platform>
+ <ProductVersion>10.0.0</ProductVersion>
+ <SchemaVersion>2.0</SchemaVersion>
+ <ProjectGuid>{A654F3B8-E859-4E6A-B30D-227527DBEF0D}</ProjectGuid>
+ <OutputType>Exe</OutputType>
+ <RootNamespace>Grpc.IntegrationTesting.Server</RootNamespace>
+ <AssemblyName>Grpc.IntegrationTesting.Server</AssemblyName>
+ <StartupObject>Grpc.IntegrationTesting.Server.Program</StartupObject>
+ <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+ </PropertyGroup>
+ <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' ">
+ <DebugSymbols>true</DebugSymbols>
+ <DebugType>full</DebugType>
+ <Optimize>false</Optimize>
+ <OutputPath>bin\Debug</OutputPath>
+ <DefineConstants>DEBUG;</DefineConstants>
+ <ErrorReport>prompt</ErrorReport>
+ <WarningLevel>4</WarningLevel>
+ <Externalconsole>true</Externalconsole>
+ <PlatformTarget>x86</PlatformTarget>
+ </PropertyGroup>
+ <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x86' ">
+ <DebugType>full</DebugType>
+ <Optimize>true</Optimize>
+ <OutputPath>bin\Release</OutputPath>
+ <ErrorReport>prompt</ErrorReport>
+ <WarningLevel>4</WarningLevel>
+ <Externalconsole>true</Externalconsole>
+ <PlatformTarget>x86</PlatformTarget>
+ </PropertyGroup>
+ <ItemGroup>
+ <Reference Include="System" />
+ </ItemGroup>
+ <ItemGroup>
+ <Compile Include="Program.cs" />
+ <Compile Include="Properties\AssemblyInfo.cs" />
+ </ItemGroup>
+ <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+ <ItemGroup>
+ <ProjectReference Include="..\Grpc.IntegrationTesting\Grpc.IntegrationTesting.csproj">
+ <Project>{C61154BA-DD4A-4838-8420-0162A28925E0}</Project>
+ <Name>Grpc.IntegrationTesting</Name>
+ </ProjectReference>
+ </ItemGroup>
+</Project>
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