ASP.NET Web.config AppSettings Performance

Question

I have a number of appSettings in web.config that are used frequently (i.e. on each post back). Does the ConfigurationManager hold these values in process or are there any

Answer 1

AFAIK the configuration is read and parsed at startup and the data is held in memory thereafter. I don't believe any performance gains from caching the state in application variables will be significant - though you may get improved readability as you don't litter the code with ConfigurationManager.AppSettings[...].