public void AddToCart(IProductHandler _ProductHandler) { Console.WriteLine("Enter the Item Id to Add it to Your cart"); int ItemId = Convert.ToInt32(Console.ReadLine()); string name = _ProductHandler.GetProductName(ItemId); double cost = _ProductHandler.GetProductCost(ItemId); CustomerCartList.Add(new Cart { _ItemId = ItemId, _ItemName = name, _ItemCost = cost }); }