Directory.Build.targets

<Project>

  <!--
  Use a technique to add assembly attributes with parameters inserted literally.
  Credit to Anairkoen Schno: https://github.com/dotnet/msbuild/issues/2281#issuecomment-748082402
  -->
  <PropertyGroup>
    <_LiteralAssemblyFile Condition="'$(Language)' == 'C#'">$(IntermediateOutputPath)LiteralAssemblyAttributes.cs</_LiteralAssemblyFile>
    <CoreCompileDependsOn>
      AddLiteralAssemblyAttributes;
      $(CoreCompileDependsOn);
    </CoreCompileDependsOn>
  </PropertyGroup>

  <Target Name="AddLiteralAssemblyAttributes"
          BeforeTargets="CoreCompile"
          Condition="'$(Language)' == 'C#'"
          Inputs="$(MSBuildAllProjects)"
          Outputs="$(_LiteralAssemblyFile)">

    <ItemGroup>
      <Compile Include="$(_LiteralAssemblyFile)" />
    </ItemGroup>

    <ItemGroup>
      <_LiteralAssemblyAttrDecls Include="// &lt;autogenerated /&gt;" />
      <_LiteralAssemblyAttrDecls Include="extern alias %(LiteralAssemblyAttributeExternAlias.Identity);"
                                 Condition="'%(LiteralAssemblyAttributeExternAlias.Identity)' != ''" />
      <_LiteralAssemblyAttrDecls Include="[assembly: %(LiteralAssemblyAttribute.Identity)(%(LiteralAssemblyAttribute._Parameters))]"
                                 Condition="'%(LiteralAssemblyAttribute.Identity)' != ''" />
    </ItemGroup>

    <WriteLinesToFile File="$(_LiteralAssemblyFile)" Encoding="UTF-8" Lines="@(_LiteralAssemblyAttrDecls)" Overwrite="true" />
  </Target>

</Project>