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Whats the best way to customize application.master Master Page without going into the "Microsoft's Unsupported Environment" state?

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up vote 3 down vote accepted

I have a blog post from a few years ago explaining how to create a httpmodule that sets your normal masterpage to be the one for the application pages. You can check it out here: This is a supported scenerio.

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Ill second the http module approach. Theres alot of examples of this out there, i think the "original" one was by Steve Caravajal on MSDN:… – Anders Rask Feb 10 '10 at 13:08

The above reply would be the best approach if you are truly looking to modify the master and need an overhaul. Otherwise, if you just did a custom theme this would cascade to the application pages. Unfortunately it usually results in modifying the master. Looks like you have the option for that. :)


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I've had a great deal of success using a custom style sheet. seems a great deal of the styles are the same across the default and application master pages.

The only difference in one site I branded was the search field that is not included on the application.master.

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