introduce Version.cs as single source of truth of gRPC C# version

src/csharp/Grpc.IntegrationTesting.Client/Properties/AssemblyInfo.cs

@@ -9,4 +9,3 @@ using System.Runtime.CompilerServices;
 [assembly: AssemblyCopyright("Google Inc.  All rights reserved.")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
-[assembly: AssemblyVersion("0.6.*")]

src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj

@@ -36,6 +36,9 @@
     <Reference Include="System" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="..\Grpc.Core\Version.cs">
+      <Link>Version.cs</Link>
+    </Compile>
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>

src/csharp/Grpc.IntegrationTesting.Server/Properties/AssemblyInfo.cs

@@ -9,4 +9,3 @@ using System.Runtime.CompilerServices;
 [assembly: AssemblyCopyright("Google Inc.  All rights reserved.")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
-[assembly: AssemblyVersion("0.6.*")]

src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj

@@ -75,6 +75,9 @@
     </Reference>
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="..\Grpc.Core\Version.cs">
+      <Link>Version.cs</Link>
+    </Compile>
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Empty.cs" />
     <Compile Include="Messages.cs" />

src/csharp/Grpc.IntegrationTesting/Properties/AssemblyInfo.cs

@@ -9,4 +9,3 @@ using System.Runtime.CompilerServices;
 [assembly: AssemblyCopyright("Google Inc.  All rights reserved.")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
-[assembly: AssemblyVersion("0.6.*")]