private void BtnDeleteBook_Click(object sender, RoutedEventArgs e) { if (!Validation()) { return; } if (MessageBox.Show("Do you want to delete this book?", "Question", MessageBoxButton.YesNo, MessageBoxImage.Information) == MessageBoxResult.Yes) { dr.DeleteBooks(bk.Id); btnAddBook.Visibility = Visibility.Visible; btnUpdateBook.Visibility = Visibility.Hidden; btnDeleteBook.Visibility = Visibility.Hidden; FillDG(); ResetTextBox(); } }