Use app_offline.htm to take your asp.net 2.0 application offline
by Jim Geurts on Feb.16, 2007, under Uncategorized
If you’re looking to do an update to your website and want all dynamic page requests to be redirected to a static html file, just create an app_offline.htm page. It’s a handy way to give a polite message when you’re making a site update. More info here…