static void addNewCustomerProductListWithSP(int productId, int customerId, int amount)
        {
            YTUEFEntities context = new YTUEFEntities();

            #region ilk kullanım
            //int result = context.addNewCustomerProductList(customerId, productId, amount, 100M, DateTime.Now);
            #endregion
            #region Product ID değerine göre listprice * amount olarak kullanımı
            var theProduct = context.Products.Find(productId);
            if (theProduct != null)
            {
                context.addNewCustomerProductList(customerId, productId, amount, (theProduct.ListPrice * amount), DateTime.Now);
            }
            #endregion
        }