How do you bring web site down so that users cannot access any page for new patch release or upgradation of release?

How do you bring web site down so that users cannot access any page for new patch release or upgradation of release? There are ofcourse numerous ways to do that but one of the easiest way in .net 2.0 is copying Application offline (app_offline.htm) htm file into the root directory of the web site. Users will not get 404 or other HTML error pages but user friendly HTML (app_offline.htm) page.

Here's quick video which shows the demonstration...


HTH - Dipesh