/* 2) Display list of licence numbers */
        private void displayListOfLicenceNumbers()
        {
            System.Console.Clear();
            System.Console.WriteLine(createMenuStringFromEnum(typeof(eFilteredOrUnfiltered), "Would you like to see a filtered or unfiltered list of license numbers?"));

            int userSelection = this.promptUserForMenuSelection(Enum.GetNames(typeof(eFilteredOrUnfiltered)).Length);

            Dictionary <string, Vehicle> .KeyCollection listOfLicenses;

            if (userSelection == 1)
            {
                System.Console.WriteLine(createMenuStringFromEnum(typeof(Vehicle.eVehicleStatus), "Please enter a vehicle status you would like to filter by:"));
                int userChoice = promptUserForMenuSelection(Enum.GetNames(typeof(Vehicle.eVehicleStatus)).Length);
                listOfLicenses = m_Garage.GetFilteredListOfLicenseNumbers((Vehicle.eVehicleStatus)(userChoice - 1));
            }
            else
            {
                listOfLicenses = m_Garage.GetListOfLicenceNumbers();
            }

            if (listOfLicenses.Count == 0)
            {
                System.Console.WriteLine("No vehicles in the garage");
                System.Console.WriteLine(Environment.NewLine);
            }
            else
            {
                int vehicleNumber = 1;

                foreach (string license in listOfLicenses)
                {
                    System.Console.WriteLine(string.Format("{0}. Licence number: {1}{2}", vehicleNumber, license, Environment.NewLine));
                    vehicleNumber++;
                }
            }
            //System.Console.Clear();
            returnToMenuOrQuit();
        }