Krzysztof Cwalina and team released a Framework Design Studio that is a set of tools for framework and library developers to view, review, and compare versions of managed APIs.
It allows you to
- List APIs exposed from a managed code assembly
- Compare APIs in two versions of an assembly
- Review APIs
- Comment on API design
- File bugs to a defect database (via plug-in)
- Export Comments to a Microsoft Word document
Download it from Code Gallery.
You might be also interested in the following blog post regarding LINQ in API's:
LINQ Best Practices within Framework APIs - Framework Design Guidelines