Converted build to also work under .net 3.5

build/Common.targets

@@ -7,17 +7,18 @@
 		<MakeDir Directories="@(WorkingDirectories)" />
 	</Target>
 
-	<Target Name="_Compile" DependsOnTargets="_Clean">
-		<MSBuild Projects="$(SolutionFile)" Properties="Configuration=$(BuildConfiguration)" BuildInParallel="true" />
-	</Target>
+  <Target Name="_Compile" DependsOnTargets="_Clean">
+    <MSBuild Projects="$(SolutionFile)" Properties="Configuration=$(BuildConfiguration)" BuildInParallel="true" Condition=" '$(BuildTools)' == '' " />
+    <MSBuild Projects="$(SolutionFile)" Properties="Configuration=$(BuildConfiguration);TargetFrameworkVersion=v2.0" Condition=" '$(BuildTools)' == 'v3.5' " />
+  </Target>
 
+	<Target Name="_CompileGeneratedSource" DependsOnTargets="_CopyGeneratedSource">
+    <MSBuild Projects="$(SolutionFile)" Properties="Configuration=$(BuildConfiguration)" BuildInParallel="true" Condition=" '$(BuildTools)' == '' " />
+    <MSBuild Projects="$(SolutionFile)" Properties="Configuration=$(BuildConfiguration);TargetFrameworkVersion=v2.0" Condition=" '$(BuildTools)' == 'v3.5' " />
+  </Target>
+  
 	<Target Name="_GenerateSource">
-		<PropertyGroup>
-			<ProtosList>@(Protos)</ProtosList>
-			<Args>$(ProtosList.Replace(`;`,` `))</Args>
-		</PropertyGroup>
-
-		<Exec Command="$(ProtocExePath) --proto_path=$(ProtosDirectory) --descriptor_set_out=compiled.pb $(Args)" WorkingDirectory="$(BuildTempDirectory)" />
+    <Exec Command="$(ProtocExePath) --proto_path=$(ProtosDirectory) --descriptor_set_out=compiled.pb @(Protos->'%(RelativeDir)%(Filename)%(Extension)', ' ')" WorkingDirectory="$(BuildTempDirectory)" />
 		<Exec Command="$(ProtogenExePath) compiled.pb" WorkingDirectory="$(BuildTempDirectory)" />
 	</Target>
 
@@ -25,10 +26,6 @@
 		<Copy SourceFiles="%(GeneratedSource.Identity)" DestinationFiles="%(GeneratedSource.TargetDirectory)\%(GeneratedSource.Filename)%(GeneratedSource.Extension)" />
 	</Target>
 
-	<Target Name="_CompileGeneratedSource" DependsOnTargets="_CopyGeneratedSource">
-		<MSBuild Projects="$(SolutionFile)" Properties="Configuration=$(BuildConfiguration)" BuildInParallel="true" />
-	</Target>
-
 	<Target Name="_Test" DependsOnTargets="_CompileGeneratedSource" Condition="$(BuildConfiguration)=='Debug' or $(BuildConfiguration)=='Release'">
 		<Exec Command="&quot;$(NUnitExePath)&quot; %(TestContainer.Identity) /xml:$(BuildTempDirectory)\..\%(TestContainer.Filename).$(BuildConfiguration).xml" />
 	</Target>

build/build.csproj

@@ -6,7 +6,7 @@
 		<BuildConfiguration></BuildConfiguration>
 
 		<!--Directory Paths-->
-		<ProjectDirectory>$(MSBuildProjectDirectory)\..</ProjectDirectory>
+    <ProjectDirectory>$(MSBuildProjectDirectory)\..</ProjectDirectory>
 		<SourceDirectory>$(ProjectDirectory)\src</SourceDirectory>
 		<LibDirectory>$(ProjectDirectory)\lib</LibDirectory>
 		<ProtosDirectory>$(ProjectDirectory)\protos</ProtosDirectory>
@@ -15,9 +15,10 @@
 		<BuildOutputDirectory>$(ProjectDirectory)\build_output\$(BuildConfiguration)</BuildOutputDirectory>
 		
 		<!--File Paths-->
-		<SolutionFile>$(SourceDirectory)\ProtocolBuffers.sln</SolutionFile>
-		
-		<!--Tool Paths-->
+    <SolutionFile Condition=" '$(BuildTools)' == '' ">$(SourceDirectory)\ProtocolBuffers.sln</SolutionFile>
+    <SolutionFile Condition=" '$(BuildTools)' == 'v3.5' ">$(SourceDirectory)\ProtocolBuffers2008.sln</SolutionFile>
+
+    <!--Tool Paths-->
 		<ProtocExePath>$(LibDirectory)\protoc.exe</ProtocExePath>
 		<ProtogenExePath>$(SourceDirectory)\ProtoGen\bin\$(BuildConfiguration)\protogen.exe</ProtogenExePath>
 		<ProtoBenchExePath>$(BuildTempDirectory)\ProtoBench.exe</ProtoBenchExePath>

build/build35.bat

+@echo off
+SET START_DIR=%CD%
+CD %~dp0
+%WINDIR%\Microsoft.NET\Framework\v3.5\MSBuild.exe build.csproj /t:Build /p:BuildConfiguration=Debug /p:Platform="Any CPU" /p:TargetFramework="v2.0" /p:BuildTools="v3.5" /toolsversion:3.5
+CD %START_DIR%
+SET START_DIR=