public ActionResult AddToCart(int productId)
{
var productToBeAdded = _productService.GetById(productId);
var cart = _cartSessionService.GetCart();
_cartService.AddToCart(cart, productToBeAdded);
_cartSessionService.SerCart(cart);
TempData.Add("message", String.Format("Your product,{0},was successfully added to the cart!", productToBeAdded.ProductName));
return(RedirectToAction("Index", "Product"));
}