Now you might be wondering what happens behind the scenes. Well, when you compile your application, the compiler actually copies the app. config file to the output folder, but gives it another name: When you start your application (ConsoleApp1.exe in our example), the matching config file will be loaded too.

Is app config compiled into DLL?

The default values are integrated into the DLL, but at runtime the configuration system will first check the exename. config file (or the user settings paths) for any modified values.

Are config files executable?

Application Configuration Files Executable–hosted app. … The name of the configuration file is the name of the app with a . config extension. For example, an app called myApp.exe should have a source configuration file called myApp.exe.