static void Main(string[] args)
{
Originator originator = new Originator(new State("Initial state", 20));
Console.WriteLine("Originator's states (we add 4 states and save first 3 of them in the caretaker): ");
originator.PrintState();
Caretaker caretaker = new Caretaker(originator);
caretaker.Save();
originator.ChangeState(new State("Second state", 21));
originator.PrintState();
caretaker.Save();
originator.ChangeState(new State("Third state", 22));
originator.PrintState();
caretaker.Save();
originator.ChangeState(new State("Fourth state", 22));
originator.PrintState();
Console.WriteLine();
PrintMementoes(caretaker);
Console.WriteLine("UNDO THE LAST CHANGE");
caretaker.Undo();
Console.WriteLine("Mementoes after undo: ");
PrintMementoes(caretaker);
Console.WriteLine();
Console.WriteLine("Originator's state after undo: ");
originator.PrintState();
Console.WriteLine();
Console.WriteLine("Press any key to continue");
Console.ReadKey(true);
}
public Caretaker(Originator originator)
{
this.originator = originator;
mementoes = new List <IMemento>();
index = 0;
}
