Unlike most of the teams inside of the Developer Division, we're actually building ASP.NET MVC on the released versions of Visual Studio. The division has a ton of custom-built tooling, but since we don't live in the same space as they do, we're using the same tools and techniques that you guys use.
When I discovered that FxCop failures don't break the build by default, I went a-Bing'in to find the answer. What I found was several blog posts like this one from Ade Miller that described post-processing the XML file with a custom task to determine if they should fail the build. I think we could do better. I wanted our FxCop failures to feel just like standard build failures, not like afterthoughts with custom reports.
I'm no stranger to writing MSBuild plugins, so I decided it would be worth a few hours to write a task which not only ran FxCop, but parsed the resulting XML and turned it into MSBuild-style warnings and failures as appropriate.
Read more: Brad Wilson