public object Next() { Book book = bookShelf.GetBookAt(index); index++; return(book); }
public object Next() { Book book = BookShelf.GetBookAt(Index); this.Index++; return(book); }
static void Main(string[] args) { var bookShelf = new BookShelf(); bookShelf.AppendBook(new Book("書籍1")); Console.WriteLine(bookShelf.GetBookAt(0).Name); }