At the moment there is Xamarin.Forms which actually can target osx,gdk and uwp or wpf. which means you actually can have a cross plat gui on all platforms, sta

At the moment there is Xamarin.Forms which actually can target osx,gdk and uwp or wpf. which means you actually can have a cross plat gui on all platforms, stability differs for each platform and I also did not like the mono runtime that much, a lot of stuff is not as good as it is in the .net core runtime.