I am trying to read a config file of a dll, but when I use
ConfigurationManager.AppSettings["key"]

It refer to the application.exe.config file that I am running. Any one know
how do I force it to read the dll config file instead of the application
config file. I look into
ConfigurationManager.OpenExeConfiguration("filepath"), but could not find
any example how to read the value in AppSetting, most people use this method
to write setting to it, but not the other way around.

Thanks!