yavsc/wrap/mscorlib/project.json

{
  "version": "1.0.0-*",
  "frameworks": {
    "net45+win+wpa81+MonoAndroid10+Xamarin.iOS10+MonoTouch10": {
      "bin": {
        "assembly": "../../../../../../../Program Files (x86)/Reference Assemblies/Microsoft/Framework/MonoAndroid/v1.0/mscorlib.dll"
      }
    }
  }
}