Hi, may I suggest you practice your whiteboard skills. They are used quite often and if you haven't experienced them it is possible you will not do well even though you may know the subject or a solution that is presented or required to solve. I learned this a hard way, so my suggestion is after reading some book or article you should try some online aptitude test for programming (for example try these C# programming tests).
But don't solve them online, rather try to solve them on a piece of paper and then check on your IDE how good you wrote your code, this exercise will really help you a lot with a whiteboard interviews.

hi,
refer Shivprasad Koirala book.
Apart of this there are many links where you will get Interview Question

http://www.blendinfotech.com/dot-net-interview-questions-and-answers-for-2-years-experience

http://www.codeproject.com/Articles/637480/Csharp-and-ASP-NET-Interview-Question-and-Answers

Thank you for suggestion.
could you please provide latest book link if you have        

.net interview question by shivprasad koirala