MonoGame.Samples/Draw2D/Platforms/iOS/AppDelegate.cs

using Foundation;
using UIKit;

namespace Draw2D
{
    [Register("AppDelegate")]
    public class AppDelegate : UIApplicationDelegate
    {
        public override UIWindow Window { get; set; }

        public override bool FinishedLaunching(UIApplication application, NSDictionary launchOptions)
        {
            Window = new UIWindow(UIScreen.MainScreen.Bounds);
            var game = new Game1();
            game.Run();
            return true;
        }
    }
}