static void Main(string[] args) { SetupAirlineData(); string command = ""; do { command = Console.ReadLine() ?? ""; var enteredText = command.ToLower(); if (enteredText.Contains("print summary")) { Console.WriteLine(); Console.WriteLine(_scheduledFlight.GetSummaryReport()); } else if (enteredText.Contains("add general")) { AddPassengerToScheduledFlight(enteredText, PassengerTypeEnum.General, false); } else if (enteredText.Contains("add loyalty")) { AddPassengerToScheduledFlight(enteredText, PassengerTypeEnum.LoyaltyMember, true); } else if (enteredText.Contains("add airline")) { AddPassengerToScheduledFlight(enteredText, PassengerTypeEnum.AirlineEmployee, false); } else if (enteredText.Contains("add discounted")) { AddPassengerToScheduledFlight(enteredText, PassengerTypeEnum.Discounted, false); } else if (enteredText.Contains("exit")) { Environment.Exit(1); } else { WriteUnknownInputMessage(); } } while (command != "exit"); }