static void Main(string[] args)
{
Originator <int> originator = new Originator <int>();
originator.State = 1;
CareTaker <int> careTaker = new CareTaker <int>();
careTaker.Memento = originator.Redo();
Console.WriteLine(originator.State.ToString());
originator.State = 2;
Console.WriteLine(originator.State.ToString());
originator.Undo(careTaker.Memento);
Console.WriteLine(originator.State.ToString());
}
static void Main(string[] args)
{
Originator originator = new Originator();
CareTaker careTaker = new CareTaker();
originator.SetState("State #1");
originator.SetState("State #2");
careTaker.Add(originator.SaveStateToMemento());
originator.SetState("State #3");
careTaker.Add(originator.SaveStateToMemento());
originator.SetState("State #4");
Console.WriteLine($"Current State:{originator.GetState()}");
originator.GetStateFromMemento(careTaker.Get(0));
Console.WriteLine($"First saved State:{originator.GetState()}");
originator.GetStateFromMemento(careTaker.Get(1));
Console.WriteLine($"Second saved State:{originator.GetState()}");
Console.ReadKey();
}