title: This project references NuGet package(s) that are missing on this computer - Android.Support.Annotations.targets
body: <p>Error       This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see <a href="http://go.microsoft.com/fwlink/?LinkID=322105" rel="nofollow noreferrer">http://go.microsoft.com/fwlink/?LinkID=322105</a>. The missing file is ..\packages\Xamarin.Android.Support.Annotations.26.1.0.1\build\MonoAndroid80\Xamarin.Android.Support.Annotations.targets.</p>