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Is it necessary to restart IIS when installing a new ISAPI filter?

Always? Sometimes? When?

I'd appreciate documentation links, if you have 'em.


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up vote 3 down vote accepted

If you are adding a filter at the site level, a restart is not required - but you do need to make at least 1 request to the website for the filter to "load".

If you are adding a filter at the global level, a restart is required.

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