partial void DeleteMenu(Menu instance);
 partial void UpdateMenu(Menu instance);
		private void detach_Menus(Menu entity)
		{
			this.SendPropertyChanging();
			entity.MenuType = null;
		}
 partial void InsertMenu(Menu instance);
		private void attach_Menus(Menu entity)
		{
			this.SendPropertyChanging();
			entity.MenuType = this;
		}