We presently override appSettings
from our web.config in a Local.config file for each developer. However we also need to override connection strings, so we access
In the main application configuration file, you use the configSource attribute to specify the fully qualified name and location of the external file. This example refers to an external configuration file named connections.config.
<?xml version='1.0' encoding='utf-8'?>
<configuration>
<connectionStrings configSource="connections.config"/>
</configuration>
For detailed information, please visit this link on msdn (section: Using External Configuration Files)