public RedirectToActionResult AddToCart(int id)
        {
            var item = _bookRepository.Books.FirstOrDefault(i => i.ID == id);

            if (item != null)
            {
                _shopCart.AddToCar(item);
            }
            return(RedirectToAction("Index"));
        }
        public RedirectToActionResult addToCart(int id)
        {
            var item = _carRep.Cars.FirstOrDefault(i => i.id == id);

            if (item != null)
            {
                _shopCart.AddToCar(item);
            }
            return(RedirectToAction("Index"));
        }