public ActionResult AddCouponCode(string couponCode)
        {
            if (_cartService.AddCouponCode(CartWithValidationIssues.Cart, couponCode))
            {
                _orderRepository.Save(CartWithValidationIssues.Cart);
            }
            else
            {
                return(new HttpStatusCodeResult(HttpStatusCode.NoContent));
            }

            var viewModel = _cartViewModelFactory.CreateSimpleLargeCartViewModel(CartWithValidationIssues.Cart);

            return(PartialView("_CartSummary", viewModel));
        }