private static void RunToDoDemo()
{
ToDoItem toDoItem = new ToDoItem(
"Buy bread",
"Go TO bakery",
new DateTime(2021, 5, 7, 13, 55, 55)
);
Memento memento = toDoItem.StoreState();
CareTaker careTaker = new CareTaker();
careTaker.Save("Bread", memento);
Console.WriteLine(toDoItem);
toDoItem.Rename("Buy milk");
toDoItem.ChangeTask("Go to milk shop");
careTaker.Save("Milk", toDoItem.StoreState());
Console.WriteLine(toDoItem);
toDoItem.RestoreState(careTaker.GetState("Bread"));
Console.WriteLine(toDoItem);
toDoItem.RestoreState(careTaker.GetState("Milk"));
Console.WriteLine(toDoItem);
}