Configuration Settings those cannot be overridden in lower level web.config files

This is a general question and is not about any particular issue that I开发者_如何学Python am facing right now.

As configuration settings in the child level can override the ones in parent level,errors can occur when you have 2 web.config files one redefining configuration settings that you cannot override such as authentication or session state. Issue happens when you have authentication / session state set on the lower level web.config and also in higher level web.config.

Is there any other configuration settings like these ?

You can lock configuration in parent config. Each configuration element offers several attributes for locking overrides. You should identify wich config settings are necessary for your application (or deployment) in parent config and lock them so that 3rd party application do not override them.