public static void Run()
{
ConcreteOriginator originator = new ConcreteOriginator("Super-duper-super-puper-super.");
CareTaker careTaker = new CareTaker(originator);
careTaker.BackUp();
originator.DoSomething();
careTaker.BackUp();
originator.DoSomething();
careTaker.BackUp();
originator.DoSomething();
System.Console.WriteLine();
careTaker.ShowHistory();
System.Console.WriteLine("\nClient: Now, let's rollback\n");
careTaker.Undo();
System.Console.WriteLine("\n\nClient: once more!\n");
careTaker.Undo();
System.Console.WriteLine();
}