Response.AppendHeader("Cache-Control", "no-cache; private; no-store; must-revalidate; max-stale=0; post-check=0; pre-check=0; max-age=0");
Response.AppendHeader("Pragma", "no-cache");
Response.AppendHeader("Keep-Alive", "timeout=3, max=993");
Response.AppendHeader("Expires", "Mon, 26 Jul 1997 05:00:00 GMT");