Directory.Build.targets

<Project>
  <!-- See: https://docs.microsoft.com/en-us/visualstudio/msbuild/customize-your-build?view=vs-2019#directorybuildprops-and-directorybuildtargets -->
  <PropertyGroup>
    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
  </PropertyGroup>

  <PropertyGroup Label="Build options for telemetry">
    <!-- This needs to be done in .targets, as some projects set DefineConstants but don't concatenate with existing values. -->
    <DefineConstants Condition="'$(Enable_Telemetry)' == 'true'">$(DefineConstants);PROD_CUSTOMER_TELEMETRY</DefineConstants>
  </PropertyGroup>
</Project>