Turn off caching in your pages, so the browser does not show a cached version.
Here[
^]
<%@ OutputCache Duration="0" VaryByParam="None"%>
should do it.
This[
^] is also useful. In theory, the plain HTML way to do it is:
<meta http-equiv="Pragma" content="no-cache">
although when I googled I found someone who recommended all of this:
<meta http-equiv="cache-control" content="max-age=0" />
<meta http-equiv="cache-control" content="no-cache" />
<meta http-equiv="expires" content="0" />
<meta http-equiv="expires" content="Tue, 01 Jan 1980 1:00:00 GMT" />
<meta http-equiv="pragma" content="no-cache" />