Nini Library API Reference - http://nini.sourceforge.net/

IConfigSource.GetExpanded Method 

Returns the expanded string value. This method does not replace the other key values in the IConfigSource.

string GetExpanded(
   IConfig config,
   string key
);

Parameters

config
Config to load the expanded value.
key
Configuration key.

See Also

IConfigSource Interface | Nini.Config Namespace