private string getExistingRegistrationNumberFromUser()
{
string userInput = string.Empty;
Console.Write(@"Please enter registration number (7 characters, 0-9, 'A'-'Z'):
>> ");
userInput = Console.ReadLine();
if (StringManager.IsOnlyDigitsAndCapLetters(userInput) == true && userInput.Length == 7)
{
if (m_Garage.IsVehicleExists(userInput) == false)
{
throw new ArgumentException("Vehicle_Not_Exist");
}
}
else
{
throw new Exception("Invalid data input");
}
return(userInput);
}