Compuware has a .Net Profiler for free. It helps pinpointing performance bottlenecks in .NET applications. What have you to loose ? FMS Inc's new Total Net Analyzer is here and this is a terrific tool to complement code-review sessions with your peers. It's more thorough than the VS.Net compiler (both C# & VB) and costs ~$500.[SBC's Radio Weblog]

Another good addition to .NET development environment to keep it healthy. FMS' Total Net Analyzer along a free Assembly analyzer found on Gotdotnet should really be embedded into round-the-clock build scripts. I would advocate using such tools even before the code review. Code analysis reports should be as visible as compilation warnings, because that's precisely what they are.