WPFMenuItemTest.xaml の相互作用ロジック
Наследование: System.Windows.Controls.UserControl
        static WPFMenuItemTestControl Init(Grid grid)
        {
            WPFMenuItemTestControl ctrl = new WPFMenuItemTestControl();

            grid.Children.Add(ctrl);
            return(ctrl);
        }
 static WPFMenuItemTestControl Init(Grid grid)
 {
     WPFMenuItemTestControl ctrl = new WPFMenuItemTestControl();
     grid.Children.Add(ctrl);
     return ctrl;
 }