My boss came across these skills assessment tests for Microsoft .Net development: Individual Assessments: Microsoft Visual Studio. I am normally not a big fan of these tests, but I think you may find them useful, both in assessing your own skills, and as potential interview questions. Some of the material is old (there were several Passport authentication questions), and there were no questions on SSL or using Smartcards for web authentication.

I found the tests to be quite humbling.