title: EntLib logging - add/edit TraceListeners at runtime
body: <p>I have a web application where I would like to add or edit Enterprise Library logging at runtime.  I'm familiar with how to configure EntLib Logging completely programmatically and through the config file, but I would like to use a combination of the two.  I'd like to have some base TraceListeners setup via the config file, but then at application startup, I'd like to conditionally add some Email TraceListeners depending on some other user settings stored in a database.</p>
  
  <p>My current solution is to open the web.config as a Configuration object, and modify the web.config sections by hand, but I'm wondering if there's a way to programmatically add TraceListeners to the currently configured LogWriter (or whichever) classes.</p>
  
  <p>Any suggestions?</p>