private async void Application_Idle(object sender, EventArgs e)
        {
            Console.WriteLine("Application_Idle");
            if (XplatUIMine.PaintPending)
            {
                SKCanvasForms.Invalidate();
                XplatUIMine.PaintPending = false;
            }

            await Task.Delay(1);
        }
        private async void pollDraw()
        {
            SKCanvasForms.Invalidate();

            await Task.Yield();
        }