public string Undo() { if (currentArticle > 0) { currentArticle -= 1; } Memento prev = caretaker.Get(currentArticle); string prevArticle = originator.RestoreFromMemento(prev); return(prevArticle); }
public string Undo() { if (currentArticle > 0) { currentArticle -= 1; } Memento prev = caretaker.Get(currentArticle); string prevArticle = originator.RestoreFromMemento(prev); return(prevArticle); }