How to set the version of Web Site Assemblies

I created a Website in order to create a Web User Control as a DLL. Something similar to this http://www.nathanblevins.com/2008/06/compile-a-web-user-control-into-a-dll-net-c/

The problem is that i can't set the version of the assemblies, unlike a web application where i can just go to Assem开发者_如何学运维blyInfo and change the version number. I need to be able to manage the version number as we intend to install the controls to the GAC

Little help? Thanks in advance!

Here is a very useful article on MSDN which should help you: How to: Create Versioned Assemblies for Precompiled Web Site Projects