As some of you may have already heard, Enterprise Library 4.1 was released by the Patterns & Practices group at Microsoft. I used to implement application blocks from Enterprise Library’s previous versions in my previous projects. So I decided to take a quick look for personal update.

Installing this version of Enterprise Library is much better than previous installations, as this one gives you the choice to extract AND build the different application blocks at the same time, instead of using a different installer to extract and build the source codes.  The change log for this release is available here (highly recommended to read).  If you’re looking to upgrade your skills with Enterprise Library, I strongly suggest the Hands On Labs and the Getting Started tutorials for each of the application blocks. 

For more information about Enterprise Library (resources, tutorials, news, etc.) I strongly recommend you referring to these sites:
Pieter's Blog on Enterprise Development
Tom Hollander's blog
Patterns And Practices Guidance