private void btnBorrowDelete_MouseLeftButtonUp(object sender, MouseButtonEventArgs e) { Details doc = listdoc.SelectedItem as Details; if (listdoc.SelectedIndex == -1) { MessageBox.Show("Select a Document for Remove", "Delete", MessageBoxButton.OK, MessageBoxImage.Warning); return; } MessageBoxResult result = MessageBox.Show("Are you sure about the remove " + doc.Title + " document ?", "Delete", MessageBoxButton.YesNo, MessageBoxImage.Question); if (result == MessageBoxResult.Yes) { SqlTask task = new SqlTask(); task.DeleteBorrow(doc.Id); List <Details> borrowlist = task.BorrowList(); listdoc.ItemsSource = borrowlist; listdoc.SelectedIndex = -1; } else { return; } }