how to use .config instead of app.config

Hi, I got a logging class which first used app.config. Others will be using this class and will add the project as a reference to their project, which will have their own app.config or web.config. Instead of merging the configuration, I would like to rename the app.config to logging.config. How do I get the logging.dll to automatically look and load the settings from the logging.config just like it does with appl.config? By the way, there are settings which in the app.config, which automatically loads without using ConfigurationManager.App. So, I need it to loading to be the same as app.config. Thanks ...