private static void Main() { Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture; TicketCatalog catalog = new TicketCatalog(); while (true) { string line = Console.ReadLine(); if (line == null) { break; } line = line.Trim(); string commandResult = catalog.ExecuteCommand(line); if (commandResult != null) { Console.WriteLine(commandResult); } } }