Last Friday we announced the public release of Microsoft Source Analysis for C#. This tool was originally only used by Microsoft's development teams internally (known as StyleCop) to enfore a common set of best practices for layout, readability, maintainability and documentation of C# source code.
Microsoft Source Analysis for C# is hosted at MSDN Code Gallery, where you can find more useful resources for developers.
PS. Did you know that fellow Belgian Steven Wilssens is one of the program managers behind MSDN Code Gallery?