static void Main(string[] args) { Library library = new Library(); while (true) { Console.WriteLine(" Enter command: "); string command = Console.ReadLine().ToLower(); switch (command) { case "list": library.List(); break; case "mylist": library.MyList(); break; case "take": library.Take(); break; case "give": library.Give(); break; case "exit": return; default: Console.WriteLine("Unrecognized command"); break; } } }