Window-less TrayIcon app

App.xaml.cs

        private TrayIcon icon;
        private Window? _window;

        private Window GetMainWindow()
        {
            if (_window is not null)
                return _window;
            _window = new MainWindow();
            _window.AppWindow.Closing += (s, e) =>
            {
                e.Cancel = true;
                s.Hide();
            };
            var wm = WindowManager.Get(_window);
            wm.WindowStateChanged += (s, state) => wm.AppWindow.IsShownInSwitchers = state != WindowState.Minimized;
            return _window;
        }
        protected override void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
        {
            icon = new TrayIcon(1, "Images/StatusOK.ico", "Test");
            icon.IsVisible = true;
            icon.LeftDoubleClick += (s, e) => GetMainWindow().Activate();
            icon.RightClick += (w, e) =>
            {
                var flyout = new MenuFlyout();
                flyout.Items.Add(new MenuFlyoutItem() { Text = "Open" });
                ((MenuFlyoutItem)flyout.Items[0]).Click += (s, e) => GetMainWindow().Activate();
                flyout.Items.Add(new MenuFlyoutItem() { Text = "Quit App" });
                ((MenuFlyoutItem)flyout.Items[1]).Click += (s, e) =>
                {
                    _window?.Close();
                    icon.Dispose();
                };
                e.Flyout = flyout;
            };
        }