static void Main(string[] args)
{
Console.WriteLine("Hello World!");
var careTaker = new CareTaker();
var originator = new Originator(
new State(1, "This is the first state", 0x01));
originator.SetInternalState(
new State(2, "The second case", 0x01));
careTaker.AddMemento(originator.CreateMemento());
originator.SetInternalState(
new State(3, "The third state", 0x02));
careTaker.AddMemento(originator.CreateMemento());
originator.SetInternalState(
new State(4, "The fourth one", 0x04));
// Restore to 3. state
originator.RestoreFromMemento(careTaker.GetMemento());
// Restore to 2. state
originator.RestoreFromMemento(careTaker.GetMemento());
originator.SetInternalState(
new State(5, "The fifth state", 0x08));
// No change from current state, because no memento is saved
originator.RestoreFromMemento(careTaker.GetMemento());
}
static void Main(string[] args)
{
Book book = new Book
{
Isbn = "123456",
Title = "Sefiller",
Author = "Victor Hugo"
};
book.ShowBook();
CareTaker history = new CareTaker();
history.Memento = book.CreateUndo();
book.Isbn = "3432";
book.Title = "XSXS";
book.ShowBook();
book.RestoreFromUndo(history.Memento);
}