public ActionResult UpdateProduct(String Product, string TransactionID, string Quantity, string Cost)
        {
            List <Orders> ShoppingCart = HomeManager.ReadExistingOrders(TransactionID);


            // Need to look at quantity too.
            var itemToRemove = (from item in ShoppingCart
                                where item.Serial == Product
                                select item).FirstOrDefault();

            ShoppingCart.Remove(itemToRemove);



            if (HomeManager.DeleteProducts(ShoppingCart, TransactionID, Product))
            {
                Orders ModifyCart = new Orders {
                    Cost = Cost, Quantity = Quantity, Serial = Product
                };
                ShoppingCart.Add(ModifyCart);

                if (HomeManager.InsertOrderItem(ShoppingCart, TransactionID))
                {
                }
            }

            return(RedirectToAction("About"));
        }