public ActionResult AddToCart(int productId)
        {
            string userId = User.Identity.GetUserId();
            ApplicationUserIdentity user        = userAppService.FindByID(userId);
            CartProduct             cartProduct = new CartProduct()
            {
                CartID    = user.Id,
                ProductID = productId,
                Quantity  = 1
            };

            cartAppService.addProduct(cartProduct);
            TempData["Msg_Cart"] = "New Item Added Successfully To Cart";
            return(RedirectToAction("index"));
        }