ApplicationBar.MainPage.menuItem1Show_Clicked C# (CSharp) Method

        private void menuItem1Show_Clicked(object sender, RoutedEventArgs e)
        {
            var checkBox = (CheckBox)sender;
            if (checkBox.IsChecked.Value)
                ApplicationBar.MenuItems.Insert(0, menuItem1);
            else
                ApplicationBar.MenuItems.Remove(menuItem1);
        }