private static bool getIfFilterNeeded() { bool? toFilter = null; string userAnswer, error = null; Console.WriteLine("Do You Want To Filter The List? (Press Y/N)"); do { if (error != null) { Console.WriteLine(error); } userAnswer = Console.ReadLine(); }while (Garage.CheckIfYesOrNo(userAnswer, ref error, ref toFilter) == false); return(toFilter.Value); }