public void FillWheelsToMaximum() { string licenseNumber = GetLicenseNumber(); bool vehicleExist = m_Garage.VehicleExistInGarage(licenseNumber); if (vehicleExist) { m_Garage.FillToMaximum(licenseNumber); } else { string errMsg = string.Format("Vehicle {0} is not existing in the garage", licenseNumber); throw new ArgumentException(errMsg); } }