BuildTarget_ConfigurationTransform.csproj

  <!-- ****************************************** -->
  <!-- Begin App.config Transform Settings        -->
  <!-- VSなど、BuildTargetを渡さずビルドした時専用   -->  
  <!-- ****************************************** -->  
  <UsingTask TaskName="TransformXml" AssemblyFile="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\Web\Microsoft.Web.Publishing.Tasks.dll" />
  <Target Name="AfterCompile" Condition="Exists('app.$(Configuration).config') And '$(BuildTarget)'==''">
    <!--Generate transformed app config in the intermediate directory-->
    <TransformXml Source="app.config" Destination="$(IntermediateOutputPath)$(TargetFileName).config" Transform="app.$(Configuration).config" />
    <!--Force build process to use the transformed configuration file from now on.-->
    <ItemGroup>
      <AppConfigWithTargetPath Remove="app.config" />
      <AppConfigWithTargetPath Include="$(IntermediateOutputPath)$(TargetFileName).config">
        <TargetPath>$(TargetFileName).config</TargetPath>
      </AppConfigWithTargetPath>
    </ItemGroup>
  </Target>
  <!--Override After Publish to support ClickOnce AfterPublish. Target replaces the untransformed config file copied to the deployment directory with the transformed one.-->
  <Target Name="AfterPublish">
    <PropertyGroup>
      <DeployedConfig>$(_DeploymentApplicationDir)$(TargetName)$(TargetExt).config$(_DeploymentFileMappingExtension)</DeployedConfig>
    </PropertyGroup>
    <!--Publish copies the untransformed App.config to deployment directory so overwrite it-->
    <Copy Condition="Exists('$(DeployedConfig)')" SourceFiles="$(IntermediateOutputPath)$(TargetFileName).config" DestinationFiles="$(DeployedConfig)" />
  </Target>
  <!-- ****************************************** -->
  <!-- Begin App.config Custom Transform Settings -->
  <!-- MSBuild で /p:BuildTarget=Xxx を渡した時専用 -->
  <!-- ****************************************** -->  
  <Target Name="AfterCompile" Condition="Exists('app.$(BuildTarget).config') And '$(BuildTarget)'!=''">
    <!--Generate transformed app config in the intermediate directory-->
    <TransformXml Source="app.config" Destination="$(IntermediateOutputPath)$(TargetFileName).config" Transform="app.$(BuildTarget).config" />
    <!--Force build process to use the transformed configuration file from now on.-->
    <ItemGroup>
      <AppConfigWithTargetPath Remove="app.config" />
      <AppConfigWithTargetPath Include="$(IntermediateOutputPath)$(TargetFileName).config">
        <TargetPath>$(TargetFileName).config</TargetPath>
      </AppConfigWithTargetPath>
    </ItemGroup>
  </Target>
  <!-- ここで↑で生成した $(IntermediateOutputPath) (つまりobj/$(Configuration)) にあるコピー元となる -sc.App.Config を差し替え-->
  <!-- -sc.App.Config が元となって、bin/$(Configuration) の exe.config が差し変わる -->
  <!-- -sc.App.Config が .exe.config より新しいかも判定して MSBuild はコピーしてるので、両方差し替えるの雑だけど安定 -->
  <Target Name="AfterBuild" Condition="Exists('app.$(BuildTarget).config') And '$(BuildTarget)'!=''">
    <Delete Files="$(IntermediateOutputPath)$(ProjectFileName)-sc.App.config" />
    <Copy SourceFiles="$(IntermediateOutputPath)$(TargetFileName).config"
          DestinationFiles="$(OutDir)$(TargetFileName).config" />
    <Copy SourceFiles="$(IntermediateOutputPath)$(TargetFileName).config"
          DestinationFiles="$(IntermediateOutputPath)$(ProjectFileName)-sc.App.config" />    
  </Target>
  <!-- ****************************************** -->
  <!-- End App.config Custom Transform Settings   -->
  <!-- ****************************************** -->  

MSBuild_HogeBuild.cmd

"C:\Program Files (x86)\MSBuild\14.0\Bin\MSBuild" ConsoleApplication2\ConsoleApplication2.csproj /p:Configuration=Release,BuildTarget=Hoge