Interesting stuff : http://blogs.msdn.com/bclteam/archive/2009/05/22/what-s-new-in-the-bcl-in-net-4-beta-1-justin-van-patten.aspx My favorite features are parallel extensions, code contracts (I was familiarized with them thanks to Peli ), memory mapped files and compression improvements. Hell, any improvement to the current state ...

Thanks to Bill Evjen for informing about this. Download: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=752cb725-969b-4732-a383-ed5740f02e93 The Visual Studio 2010 and .NET Framework 4 Training Kit includes presentations, hands-on labs, and demos. This content is designed to help you learn how to utilize the Visual ...

If you do, then head to ASP.NET Forums / ASP.NET Beta 1 Forum And if you look for where to get VS2010 / ASp.NET 4.0 Beta 1, then have a look at here