private void displayAllLicenseNumbers() { Vehicle.eRepairState repairState = getRepairState(); string output = string.Format(@"All License Plate Numbers With the State of {0}: ", repairState); Console.WriteLine(output); if (r_Garage.AllLicenseNumbersWithStateOf(repairState) != null) { output = r_Garage.AllLicenseNumbersWithStateOf(repairState).ToString(); Console.WriteLine(output); } else { output = string.Format("None"); Console.WriteLine(output); } }