Gendarme is a code analysis tool that I think is superior to FxCop (although that doesn’t preclude us from using FxCop, too).

I downloaded  the binaries only package and ran the wizard against my assemblies and was impressed by the results. I think this is something I’d like to add as a report to our nightly builds in TeamCity.

Note that it recommends you select the optimise flag in your builds as otherwise the cruft in the IL can trigger false positives.