A new version of Microsoft StyleCop was released yesterday. If you are not already using StyleCop, do it try it out. For years, I have been frustrated by developers using inconsistent layouts, variables defined all over the place, different styles, etc which effect the readability of the code. This is where stylecop comes handy and once integrated into the build process, it would flag all inconsistencies in the project. This ensures that code is readable and maintainable throughout.
If you are using MSBuild Entension Pack, there is a task defined for running StyleCop. Integrate it into your CI build and the developers would instantly know if a developer have done some misdemeanour :)