Directory.Build.targets

<Project>

  <Target Name="RemoveObjAndBinFolders" AfterTargets="Clean">
    <PropertyGroup>
      <ObjFolder>$(ProjectDir)$(BaseIntermediateOutputPath)</ObjFolder>
      <BinFolder>$(ProjectDir)$(BaseOutputPath)</BinFolder>

      <!-- Microsoft.NET.Sdk.Web sets $(BaseIntermediateOutputPath) to -->
      <!-- an absolute path. Not fixed up to MsBuild 17! -->
      <BaseIntermediateOutputPathFix Condition="$(BaseIntermediateOutputPath.StartsWith($(MSBuildProjectDirectory)))">$([MSBuild]::MakeRelative(
        $(ProjectDir),
        $(BaseIntermediateOutputPath)
      ))</BaseIntermediateOutputPathFix>

      <ObjFolder Condition="$(BaseIntermediateOutputPath.StartsWith($(MSBuildProjectDirectory)))">$(ProjectDir)$(BaseIntermediateOutputPathFix)</ObjFolder>
    </PropertyGroup>

    <ItemGroup>
      <ObjFiles Include="$(ObjFolder)/*.*"
                Exclude="$(ObjFolder)/project.assets.json" />
      <ObjSubFolders
                Include="$([System.IO.Directory]::GetDirectories('$(ObjFolder)'))" />
    </ItemGroup>

    <!-- Remove "obj" sub folders -->
    <RemoveDir Directories="@(ObjSubFolders)" ContinueOnError="true" />
    <!-- Remove "obj" files (keeping necessary asset file)-->
    <Delete Files="@(ObjFiles)" />

    <!-- Remove "bin" folders -->
    <RemoveDir Directories="$(BinFolder)" ContinueOnError="true" />
  </Target>
</Project>