What is the exercise ? See osherove.com/tdd-kata-1/
Solved using VS2010 + NUnit + Resharper 5 + Beacons (a VS2010 extension).
Note: the audio isn't too great and the pace is slow (for beginners). Intermediate users can download, enable subtitles and play at 2X/4X for best results. Use HD mode with no scaling (options visible when you hover on the video).
Subtitles : http://goo.gl/JShDQ
Next Part @ vimeo.com/gishu/stringcalckata2a
Feedback would be appreciated :) leave a note if you liked it (or why you did not).