Today, we released the 0.9.40105.0 version of Pex. The major highlights of this release are: Pre-Release license for Visual Studio 2008, better test framework integration and partial support for Visual Basic.NET/F# (read the full release notes).

CHESS, another project from RiSE, also released it’s first public download today. CHESS finds and reproduces heisenbugs in concurrent programs. CHESS uses the Pex code instrumentation technology to monitor and control the .Net threading APIs, and one day we hope to combine Pex and CHESS…

Enjoy and don’t forget to give us your feedback through the MSDN forums.