Microsoft released the February 2008 Community Technology Preview of Unity, our lightweight extensible dependency injection container. Get it from Codeplex: http://www.codeplex.com/unity. It comes with all source, test cases, a couple of examples/quickstarts and an initial set of docs. We look forward to your feedback. Don’t wait for too long. Our final release is on March 15.
Also, as a reminder, registration for the Unity Extensibility Workshop closes on February 15. Your participation is invited. If you want to jam with the Unity authors and other developers who are interested in building extensions for Unity, this is a great opportunity.
Source:→ MSDN Blogs
Microsoft, Microsoft Unity, CTP, Preview, Release