private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) { SelectAgency s = new SelectAgency(); string si = s.showSelectBox(); if (s.SelectDialogResult == System.Windows.Forms.DialogResult.OK) { currentRequest = si; linkLabel1.Text = s.SelectedTreeNode.ToString() + " cơ quan đã chọn."; } }