Today I downloaded simian, a code duplication detector. It's very easy to download and run. Simian detected a few chunks of duplicated code, which need to be refactored into a single method, or pushed up into a parent object. Simian is worth a quick download to test your code. Eval copy is available for free.
C:\opt\simian\bin\simian-2.2.24.exe -reportDuplicateText -threshold=5 *.cs > simian.txt