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;
            }
        }