something of 调试技巧

if (e.CommandName == "btnDelete")
        {
            try
            {
                PUB_COUNTRYDAL.Delete(linkButtonCode.Text );
                PHY.Common.Script.MessageBox.Show(Page, "删除成功！");
            }
            catch (Exception err)
            {
#if DEBUG
                Response.Write(err.Message);
#endif
                PHY.Common.Script.MessageBox.Show(Page, "删除失败，该已被引用！");
            }

            DisplayData();
            return;
        }