public IActionResult AddOne(int productId) { var Cart = new ShoppingCart(_contextAccessor, _context); Cart.AddOne(productId); //var Cart = new ShoppingCart(_contextAccessor, _context); //var applicationDbContext = Cart.GetCartItems().ToList(); //var applicationDbContext = _context.CartItems.Include(c => c.Product).Where(current => current.CartId == Cart.GetCart(_contextAccessor)).ToList(); return(RedirectToAction("_ViewCartPartial")); }