void ToggleMenuBarItem(object sender, EventArgs e) { MenuBarItem barItem = MenuBarItems.FirstOrDefault(x => x.Text == "Added Menu"); if (barItem == null) { barItem = new MenuBarItem() { Text = "Added Menu" }; barItem.Add(new MenuFlyoutItem() { Text = "Added Flyout Item", Command = new Command(() => ItemClicked(barItem.First(), EventArgs.Empty)) }); MenuBarItems.Add(barItem); } else { MenuBarItems.Remove(barItem); } }