The Exception Management Application Block supports persisting exceptions to the EventLog and any logging mechanism you elect to implement. The logging mechanism works by default without a lot of fussExceptionManager.Publishand supports a post-deployment implementation of any publisher you like. Hence, the EMAB is easy to use and extensible. In addition, the EMAB bottles up more complex details such as handling XML configuration blocks. Simplicity and flexibility are both desirable goals when implementing software.
When instrumenting your code for error logging, I encourage you to give the EMAB serious consideration.