public ActionResult Create(ShoppingCartItem shoppingcartitem)
 {
     if (ModelState.IsValid)
     {
         shoppingcartitemRepository.InsertOrUpdate(SetCartID(shoppingcartitem, _cartID));
         shoppingcartitemRepository.Save();
         return(RedirectToAction("Index"));
     }
     else
     {
         ViewBag.PossibleProducts = productRepository.All;
         return(View());
     }
 }