private Cart(CartId cartId, IReadOnlyCollection <CartItem> cartItems) { Require.NotNull(cartId, nameof(cartId)); Require.NotNull(cartItems, nameof(cartItems)); Id = cartId; _items = cartItems.ToDictionary(i => i.ItemId, i => i); }
public static Cart From(CartId cartId, IReadOnlyCollection <CartItem> cartItems) => new Cart(cartId, cartItems);
public static Cart New() => new Cart(CartId.New(), Array.Empty <CartItem>());