Using EL 3.0 and EL 4.0 side-by-side

Jun 25, 2009 at 4:56 PM

I have a scenario where a web application is currently using EL 3.0. The same web application is required to use a custom assembly which in-turn uses EL 4.0. We are not ready to upgrade the web application to EL 4.0 just as yet, so it needs to continue using EL 3.0 for a while. Any best practices guidance on how to implement the two versions of EL side-by-side? Thanks!

Jun 26, 2009 at 8:39 AM


Some guidelines are discussed in the documentation and is available thru this link:

Also, there are pointers given in a book called "Definitive Guide To The Microsoft Enterprise Library" but this is for the lower version. But still you can check it out, avalable in this link:


Valiant Dudan
Global Technology & Solutions
Avanade, Inc.