started using nuget packages for dependencies

src/csharp/.gitignore

 *.userprefs
 test-results
+packages
+Grpc.v12.suo

src/csharp/GrpcApi/.gitignore

 test-results
 bin
+obj

src/csharp/GrpcApi/GrpcApi.csproj

-<?xml version="1.0" encoding="utf-8"?>
+<?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>
@@ -30,19 +30,23 @@
     <ConsolePause>false</ConsolePause>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Google.ProtocolBuffers, Version=2.4.1.521, Culture=neutral, PublicKeyToken=55f7125234beb589, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Google.ProtocolBuffers.2.4.1.521\lib\net40\Google.ProtocolBuffers.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
-    <Reference Include="System.Reactive.Linq, Version=2.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
-      <Private>False</Private>
+    <Reference Include="System.Reactive.Core">
+      <HintPath>..\packages\Rx-Core.2.2.5\lib\net45\System.Reactive.Core.dll</HintPath>
     </Reference>
-    <Reference Include="System.Data.Linq" />
-    <Reference Include="System.Reactive.Interfaces, Version=2.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
-      <Private>False</Private>
+    <Reference Include="System.Reactive.Interfaces">
+      <HintPath>..\packages\Rx-Interfaces.2.2.5\lib\net45\System.Reactive.Interfaces.dll</HintPath>
     </Reference>
-    <Reference Include="System.Reactive.Core, Version=2.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
-      <Private>False</Private>
+    <Reference Include="System.Data.Linq" />
+    <Reference Include="System.Reactive.Linq">
+      <HintPath>..\packages\Rx-Linq.2.2.5\lib\net45\System.Reactive.Linq.dll</HintPath>
     </Reference>
-    <Reference Include="Google.ProtocolBuffers">
-      <HintPath>..\lib\Google.ProtocolBuffers.dll</HintPath>
+    <Reference Include="System.Reactive.PlatformServices">
+      <HintPath>..\packages\Rx-PlatformServices.2.2.5\lib\net45\System.Reactive.PlatformServices.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>
@@ -63,12 +67,10 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
+    <None Include="packages.config" />
     <None Include="proto\math.proto" />
     <None Include="proto\empty.proto" />
     <None Include="proto\messages.proto" />
     <None Include="proto\test.proto" />
   </ItemGroup>
-  <ItemGroup>
-    <Folder Include="proto\" />
-  </ItemGroup>
 </Project>
\ No newline at end of file

src/csharp/GrpcApi/packages.config

+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Google.ProtocolBuffers" version="2.4.1.521" targetFramework="net45" />
+  <package id="Ix-Main" version="1.2.3" targetFramework="net45" />
+  <package id="NUnit" version="2.6.4" targetFramework="net45" />
+  <package id="Rx-Core" version="2.2.5" targetFramework="net45" />
+  <package id="Rx-Interfaces" version="2.2.5" targetFramework="net45" />
+  <package id="Rx-Linq" version="2.2.5" targetFramework="net45" />
+  <package id="Rx-Main" version="2.2.5" targetFramework="net45" />
+  <package id="Rx-PlatformServices" version="2.2.5" targetFramework="net45" />
+</packages>
\ No newline at end of file

src/csharp/GrpcApiTests/.gitignore

 test-results
 bin
+obj

src/csharp/GrpcApiTests/GrpcApiTests.csproj

-<?xml version="1.0" encoding="utf-8"?>
+<?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>
@@ -30,13 +30,14 @@
     <ConsolePause>false</ConsolePause>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="System" />
-    <Reference Include="nunit.framework, Version=2.6.0.0, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77">
-      <Private>False</Private>
+    <Reference Include="Google.ProtocolBuffers, Version=2.4.1.521, Culture=neutral, PublicKeyToken=55f7125234beb589, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Google.ProtocolBuffers.2.4.1.521\lib\net40\Google.ProtocolBuffers.dll</HintPath>
     </Reference>
-    <Reference Include="Google.ProtocolBuffers">
-      <HintPath>..\lib\Google.ProtocolBuffers.dll</HintPath>
+    <Reference Include="nunit.framework">
+      <HintPath>..\packages\NUnit.2.6.4\lib\nunit.framework.dll</HintPath>
     </Reference>
+    <Reference Include="System" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs" />
@@ -53,4 +54,10 @@
       <Name>GrpcCore</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
+  </ItemGroup>
 </Project>
\ No newline at end of file

src/csharp/GrpcApiTests/packages.config

+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Google.ProtocolBuffers" version="2.4.1.521" targetFramework="net45" />
+  <package id="NUnit" version="2.6.4" targetFramework="net45" />
+</packages>
\ No newline at end of file

src/csharp/GrpcCore/.gitignore

 bin
+obj
\ No newline at end of file

src/csharp/GrpcCoreTests/.gitignore

 test-results
 bin
+obj
\ No newline at end of file

src/csharp/GrpcCoreTests/GrpcCoreTests.csproj

-<?xml version="1.0" encoding="utf-8"?>
+<?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>
@@ -30,10 +30,10 @@
     <ConsolePause>false</ConsolePause>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="System" />
-    <Reference Include="nunit.framework, Version=2.6.0.0, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77">
-      <Private>False</Private>
+    <Reference Include="nunit.framework">
+      <HintPath>..\packages\NUnit.2.6.4\lib\nunit.framework.dll</HintPath>
     </Reference>
+    <Reference Include="System" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs" />
@@ -49,4 +49,10 @@
       <Name>GrpcCore</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
+  </ItemGroup>
 </Project>
\ No newline at end of file

src/csharp/GrpcCoreTests/packages.config

+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="NUnit" version="2.6.4" targetFramework="net45" />
+</packages>
\ No newline at end of file

src/csharp/InteropClient/.gitignore

 bin
+obj
\ No newline at end of file

src/csharp/InteropClient/InteropClient.csproj

-<?xml version="1.0" encoding="utf-8"?>
+<?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>
@@ -33,13 +33,14 @@
     <PlatformTarget>x86</PlatformTarget>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="System" />
-    <Reference Include="nunit.framework, Version=2.6.0.0, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77">
-      <Private>False</Private>
+    <Reference Include="Google.ProtocolBuffers, Version=2.4.1.521, Culture=neutral, PublicKeyToken=55f7125234beb589, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Google.ProtocolBuffers.2.4.1.521\lib\net40\Google.ProtocolBuffers.dll</HintPath>
     </Reference>
-    <Reference Include="Google.ProtocolBuffers">
-      <HintPath>..\lib\Google.ProtocolBuffers.dll</HintPath>
+    <Reference Include="nunit.framework">
+      <HintPath>..\packages\NUnit.2.6.4\lib\nunit.framework.dll</HintPath>
     </Reference>
+    <Reference Include="System" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs" />
@@ -56,4 +57,7 @@
       <Name>GrpcApi</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
 </Project>
\ No newline at end of file

src/csharp/InteropClient/packages.config

+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Google.ProtocolBuffers" version="2.4.1.521" targetFramework="net45" />
+  <package id="NUnit" version="2.6.4" targetFramework="net45" />
+</packages>
\ No newline at end of file

src/csharp/MathClient/.gitignore

 bin
+obj