private void AddSingleAirportToList(List <Airport> listOfAirports) { bool isAirportCorrect = false; while (isAirportCorrect == false) { var airport = airportService.GetAirportByName ( communicator.AskUserForString("NAZWA LOTNISKA") ); if (airport != null) { isAirportCorrect = true; listOfAirports.Add(airport); Console.WriteLine($"Dodano lotnisko {airport.Name} do trasy przelotu"); } else { communicator.PrintWrongInputMessage(); } } }