There's a new property called "NoLock" added to the QueryExpression class for Microsoft Dynamics CRM 2011. I found this researching a locking issue on the database we were having for a client. According to the Microsoft CRM 2011 SDK:
"The benefit of setting NoLock to true is that it allows you to keep the system from issuing locks against the entities in your queries; this increases concurrency and performance because the database engine does not have to maintain the shared locks involved.
Thanks Nishant! And Varun, you are correct, it’s present in the fetch xml as well. Thanks guys!
Thank you Danny for your insightful post and your prompt reply
We have to same property in fetch xml as well