Hello Rahul Khinvasara,
Thank you for writing.
I am afraid I do not have enough information to pinpoint the issue. However, I recommend you to download the latest official release Q1 2010 SP2
and give it a try. It contains a big number of improvements and addressed issues. If the described issue is related to RadGridView functionality, there is a great chance that we have addressed it in the latest version. If you still experience any difficulties, please open a new support ticket and send me a small sample application which demonstrates your approach. This will help me to investigate the exception further and provide you with accurate assistance.
the Telerik team
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