如何在app.config文件中配置基类库？

I've found a couple of snippets of information pertaining to app.config/web.config that hints at almost codeless configuration of BCL components directly through the app.config. However, given the amount of tags suggested by the intellisense within the app.config, it suggests that there is a huge amount of possibilities for this that I can't find I've found a couple of snippets of information