Add generated documentation to nuget packages

src/csharp/Grpc.Auth/Grpc.Auth.csproj

@@ -10,6 +10,7 @@
     <RootNamespace>Grpc.Auth</RootNamespace>
     <AssemblyName>Grpc.Auth</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <DocumentationFile>bin\$(Configuration)\Grpc.Auth.Xml</DocumentationFile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>

src/csharp/Grpc.Auth/Grpc.Auth.nuspec

@@ -23,6 +23,7 @@
   <files>
     <file src="bin/Release/Grpc.Auth.dll" target="lib/net45" />
 	<file src="bin/Release/Grpc.Auth.pdb" target="lib/net45" />
+	<file src="bin/Release/Grpc.Auth.xml" target="lib/net45" />
 	<file src="**\*.cs" target="src" />
   </files>
 </package>

src/csharp/Grpc.Core/Grpc.Core.csproj

@@ -13,6 +13,7 @@
     <AssemblyName>Grpc.Core</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <NuGetPackageImportStamp>8bb563fb</NuGetPackageImportStamp>
+    <DocumentationFile>bin\$(Configuration)\Grpc.Core.Xml</DocumentationFile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>

src/csharp/Grpc.Core/Grpc.Core.nuspec

@@ -23,6 +23,7 @@
   <files>
     <file src="bin/Release/Grpc.Core.dll" target="lib/net45" />
 	<file src="bin/Release/Grpc.Core.pdb" target="lib/net45" />
+	<file src="bin/Release/Grpc.Core.xml" target="lib/net45" />
 	<file src="**\*.cs" target="src" />
   </files>
 </package>