My team is currently in the process of building an ASP.NET MVC application, and we\'re trying to decide which of these frameworks to implement to deal with error handling an
Also, Elmah is designed specifically for capturing and logging unhandled exceptions. It can be configured to log caught exceptions, but that is a recent addition and not its primary purpose.
ELMAH is simple, easy to use, and easy to implement. EntLib is big, "enterprisey", and powerful. In your case, based on the little I know about your situation, I would hesitate to recommend anything. However if I had to pick one for you I would say ELMAH for the reasons stated.
Personally, I've been using Enterprise Library for a number of our clients and I have yet to use ELMAH. Here's my thoughts on Ent Lib.
A cursory glance at ELMAH leads me to believe that it's a great way to get something up quick. Longer term, you may want something with additional power.
I may be off base here, which is quite often the case, but EntLibrary is meant to help develop exception handling whereas ELMAH is jsut going to show you when and where exceptions occured. If you just want a report of exceptions use ELMAH, if you need more power EntLib.