core-setup/Directory.Build.props

<Project>

  <PropertyGroup>
    <!--
    NOTE: This .props file assumes it is only imported by projects that use the SDK="Microsoft.NET.Sdk" in their project.
    We are currently on too old of an SDK to detect - it doesn't have https://github.com/dotnet/sdk/pull/1242.
    But once we move to a new version, we can remove this property setting, and everything else will work correctly.
    -->
    <UsingMicrosoftNETSdk Condition="'$(MSBuildProjectExtension)' == '.csproj'">true</UsingMicrosoftNETSdk>
  </PropertyGroup>

  <PropertyGroup Condition="'$(UsingMicrosoftNETSdk)' == 'true'">
    <!-- SDK-based projects' Platform should default to AnyCPU, not $(TargetArchitecture) like dir.props sets. -->
    <Platform>AnyCPU</Platform>
    <UsingNETSdkCompiler>true</UsingNETSdkCompiler>
    <DisableBuildToolsRoslynVersion>true</DisableBuildToolsRoslynVersion>
  </PropertyGroup>

  <Import Project="dir.props" />

  <PropertyGroup Condition="'$(UsingMicrosoftNETSdk)' == 'true'">
    <!--
    The Microsoft.NET.Sdk changed the definition of what it assumes $(BaseIntermediateOutputPath) is.
    In the "old" .csproj files, BaseIntermediateOutputPath could be shared with many projects.
    In the SDK-based .csproj files, BaseIntermediateOutputPath is assumed to be project-specific.
    -->
    <BaseIntermediateOutputPath>$(IntermediateOutputPath)</BaseIntermediateOutputPath>
  </PropertyGroup>

</Project>