private string getGasCarToFuelRegNum()
{
string registrationNumber = string.Empty;
eFuelType fuelType = eFuelType.None;
registrationNumber = getExistingRegistrationNumberFromUser();
if (m_Garage.CheckIfFueableCar(registrationNumber) == true)
{
fuelType = getFuelTypeInput();
if (m_Garage.CheckIfValidFuelType(registrationNumber, fuelType) == false)
{
throw new ArgumentException("Invalid_Fuel_Type");
}
}
else
{
throw new ArgumentException("Not_Fuelable_Vehicle");
}
return(registrationNumber);
}