// GET: Default public ActionResult Index() { IShoppingCartManager shoppingCartManager = new ShoppingCartManager(); List <Product> products = shoppingCartManager.GetAllProducts(); List <ProductPiece> orderProducts = new List <ProductPiece>(); orderProducts.Add(new ProductPiece() { Product = products.First(x => x.Id == 3), Piece = 1 }); orderProducts.Add(new ProductPiece() { Product = products.First(x => x.Id == 3), Piece = 1 }); orderProducts.Add(new ProductPiece() { Product = products.First(x => x.Id == 1), Piece = 2 }); orderProducts.Add(new ProductPiece() { Product = products.First(x => x.Id == 2), Piece = 1 }); ShoppingCartModel shoppingCart = shoppingCartManager.AddProductToCart(orderProducts); return(View(shoppingCart)); }