static void Main() { Console.WriteLine("Editing on GitHub here"); classArray arr = new classArray(); classStack sta = new classStack(); classQueue que = new classQueue(); string choice; do { Console.WriteLine("1.ArrayList\n2.Stack\n3.Queue"); string ch; ch = Console.ReadLine(); switch (ch) { case "1": arr.start(); break; case "2": sta.start(); break; case "3": que.start(); break; default: Environment.Exit(0); break; } Console.WriteLine("Do You wish to continue?\nY / N"); choice = Console.ReadLine(); } while (choice == "y" || choice == "Y"); }