public void RemoveItemFromCart()
        {
            var shoppingCartId = GetShoppingCartId();
            if (!shoppingCartId.HasValue)
                Response.Redirect(Url.Action("ViewRDNStore"));

            var cartItemIdRaw = Request.Form["shoppingcartitem"];

            int cartItemId;
            if (!Int32.TryParse(cartItemIdRaw, out cartItemId))
                Response.Redirect(Url.Action("ViewRDNStore"));

            var sg = new StoreGateway();
            sg.RemoveItemFromCart(shoppingCartId.Value, cartItemId);
            Response.Redirect(Url.Action("ViewRDNStore"));
        }