//show all the stock that we have
        private void ShowTotalstockBtr(object sender, RoutedEventArgs e)
        {
            BooksListStock booksListStock = new BooksListStock();

            booksListStock.Show();
        }
        // show the list of item's
        private void Available_itemsBtr(object sender, RoutedEventArgs e)
        {
            BooksListStock booksListStock = new BooksListStock();

            booksListStock.Show();
        }