private void BtnDeleteDocument_Click(object sender, EventArgs e)
 {
     try
     {
         var rslt = MessageBox.Show(Resources.MsgDocumentDeleteConfirm, Resources.AppName,
                                    MessageBoxButtons.YesNo, MessageBoxIcon.Question);
         if (rslt != DialogResult.Yes)
         {
             return;
         }
         using (var dc = new DBAuditDataContext())
         {
             dc.ProDeleteAllTransFee(ComboDocNo.Text);
         }
         MessageBox.Show(Resources.MsgDocumentDeleted, Resources.AppName, MessageBoxButtons.OK,
                         MessageBoxIcon.Information);
         Close();
         new FrmModifyTransFee().Show();
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message);
     }
 }