ConfigurationManager.AppSettings Caching

Question

We know that IIS caches ConfigurationManager.AppSettings so it reads the disk only once until the web.config is changed. This is done for performance purposes.

Someo

Answer 1

As John says only spend more time on this if you are actually seeing a performance hit.

Also I'm pretty sure that these applications hold the configuration in memory, and to see any changes within a config the application would have to be restarted.

For some further reading about remaining mysteries.