TestDriven.NET now contains some functionality what was the discontinued ReflectorVsAddin add-in. Right click and 'Test With... Reflector' to navigate to any code element inside Reflector. This works with methods, types, fields, events, enums and delegates. Click here for a demo.

A Managed C++ language add-in for .NET Reflector. Most work has gone into getting the method signatures correct. The most glaring ommisions in the method bodies are support for boxing and jagged arrays (MC++ doesn't have syntax for jagged arrays).