private void pb_addHead_Click(object sender, EventArgs e)
        {
            //lv_editRequestHeads.Items.Add("name: value");
            AddResponseHead f = new AddResponseHead(lv_editResponseHeads, this, true);

            f.ShowDialog();
        }
 private void lv_editResponseHeads_DoubleClick(object sender, EventArgs e)
 {
     if (lv_editResponseHeads.SelectedItems.Count > 0)
     {
         AddResponseHead f = new AddResponseHead(lv_editResponseHeads, this, false);
         f.ShowDialog();
     }
 }