ASP redirect all incoming requests

Hi pardon my ignorance i'm coming from an ap开发者_StackOverflow社区ache background.

On IIS/ASP.NET (.NET 4.0) is it possible to redirect all incoming requests to a page for for maintenance and such. I tried just using a 404 redirect but it doesn't seem to cut it.

Thanks in advance

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You may use an App_Offline.html file when you want to bring an ASP.NET site into maintenance mode:

The way app_offline.htm works is that you place this file in the root of the application. When ASP.NET sees it, it will shut-down the app-domain for the application (and not restart it for requests) and instead send back the contents of the app_offline.htm file in response to all new dynamic requests for the application. When you are done updating the site, just delete the file and it will come back online.