Updating Nuget caused Exception Unhandled: System.TypeLoadException

I'm starting a new master xamarin page for testing purposes and updated the nuget packages for the xamarin.android.support and xamarin.forms version. Afterwards, my program gets the exception:

The LoadApplication gets the exception error:

    base.OnCreate(savedInstanceState);
    global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
    LoadApplication(new App());


Unhandled Exception:

System.TypeLoadException: Could not load type of field 'Xamarin.Forms.Platform.Android.RendererPool:_freeRenderers' (0) due to: Could not resolve type with token 01000275 from typeref (expected class 'System.Collections.Generic.Stack`1' in assembly 'mscorlib, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e') assembly:mscorlib, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e type:System.Collections.Generic.Stack`1 member:(null) occurred