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Somasegar has announced the availability of .NET Framework 4 Beta 1 Enabled to use Software Transactional Memory v1.0, or in short STM.NET. This is an experimental version of .NET that enables software transactional memory for C# programming. It allows programmers to demarcate regions of code as operating in an atomic, isolated transaction from other code running concurently. The way to do this is with a delegate called Atomic.Do, or with a try/catch mechanism.

This experimental framework also comes with functionality like:

• tooling (debugging, ETW tracing)
• lock interoperability
• interoperability with traditional transactions
• annotations (how methods run in transactions, suppressed transactions on methods, etc.)
• static and dynamic checking of annotations

The limitations so far are that it is only supported for C#, works only with Visual Studio 2008, it doesn't work on a machine with Visual Studio 2010 beta 1 and there only a 32-bit version.

You can read more about it at:

• STM Team Blog
• MSDN DevLabs 

Microsoft has published on CodePlex an APS.NET MVP installer for Visual Studio 2010 beta 1. The beta 1 release did not have support for creating ASP.NET MVP applications (because of functionality lock down that happened before the 1.0 release of MVC). The installer that targets only Visual Studio 2010 beta 1 provides the tools and assemblies for building ASP.NET MVP applications. There are some known issues with the installer, but they are addressed in this article.