//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();
}