SignList.xml

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <ItemGroup>
    <FirstParty Include="Xamarin.*.dll" />
  </ItemGroup>

  <ItemGroup>
    <!-- <ThirdParty Include="Newtonsoft.Json.dll" /> -->
  </ItemGroup>

  <ItemGroup>
    <!-- <Skip Include="System.*.dll" /> -->
  </ItemGroup>
</Project>