C# Self tests...

There are a lot of learning resources to be found on the web. Below a few of them on C#:

C#

http://www.careerride.com/Csharp-net-practice-online-test.aspx
http://www.tutorialspoint.com/csharp/csharp_online_quiz.htm
http://www.proprofs.com/quiz-school/story.php?title=c-skills-test
http://newtechusa.com/csharp-dotnet-quiz.asp
http://www.academictutorials.com/quiz.asp?id=65

Please see http://hansrontheweb.blogspot.nl/p/self-tests-from-others.html for self tests on other topics.