I want to know which version of Rhino Mocks gets the most benefit of C# 3.0 features like lambda expressions, extension methods etc.
I believe to make use of those features of C# would ease the writing of the unit tests especially for arrange-act-assert pattern.
AAA syntax was introduced since 3.5 release:
The biggest new feature is the new AAA syntax, which you can read about in the relevant post, but we had a few other new things as well. Note that this release if for .Net 3.5 only. Rhino Mocks 3.5 RTM will be for .Net 2.0 and 3.5, but I am focusing on the capabilities that I can get from the 3.5 platform at the moment
Useful links: