public Burger Create(IIngredientFactory IngredientFactory)
        {
            var burger = new PorkBurger();

            //// 備料

            burger.Bread = IngredientFactory.GetBread();

            burger.Veggie = IngredientFactory.GetVeggie();

            //// 準備豬肉
            burger.Meat = IngredientFactory.GetPork();

            return(burger);
        }