There are lot of sites providing good content on dot net.. here are a
few links I visited recently and found good..

http://maximumcoding.blogspot.com/

http://dotnetinterviews.blogspot.com/

http://www.xcessdotnet.com/

http://techinterviewquestion.blogspot.com/

http://dotnetforum.blogspot.com/

Enjoy :)
Ayesha