public ActionResult PayOrder(ulong orderId)
 {
     CheckSession();
     PayOrderViewModel model = new PayOrderViewModel();
     using (DatabaseQuery query = new DatabaseQuery())
     {
         List<PaymentOption> paymentOptions = query.GetPaymentOptions();
         model.PaymentOptions = new SelectList(paymentOptions, "id", "name");
         model.Order = query.GetOrder(orderId);
     }
     return View(model);
 }