public RedirectToRouteResult AddGasbillToCheckout(Checkout order, GasBill gasBill, string returnUrl) { if (gasBill != null) { if (order.chosenTariff == null) { order.chosenTariff = tariffRepo.Tariffs .FirstOrDefault(p => p.Id != null); } order.InitCalc(new ValueCalculator()); order.SetGas(gasBill); } return RedirectToAction("Index", new { returnUrl }); }