public ViewResult CheckOut()
{
CartViewModel cartViewModel = GetCart();
Session.Clear();
string userId = User.Identity.GetUserId <string>();
List <CartLine> cartLines = cartViewModel.CartLineViewModels.Select(c => new CartLine()
{
ProductId = c.ProductId, Quantity = c.Quantity, TotalPrice = c.TotalPrice
}).ToList();
businessLayer.SaveOrder(cartLines, userId);
TempData["message"] = string.Format("Your order was successfully registered");
return(View("DisplayCart", GetCart()));
}