What is the use of web.config, web.config.debug, web.config.release?

Can any one please sp开发者_运维知识库ecify in depth about what is the use (when to use) Web.config,web.config.debug,web.config.release files in asp.net web applications??

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It's web.config transformation files that are used to change the web.config for debug and release builds. For example use a different database when debugging and running the release version.

See more information regarding this here.