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Error "Enumeration already finished."

Apr 9, 2014 at 7:02 AM
I am using the extended datagrid. After applying some auto filter there are no rows to display. After that when i try to apply some other auto filter, I am getting the error message.

"Enumeration already finished. Invalid Operation Exception was unhandled."

My requirement is
How to handle this exception ? and
In auto filter, how to display the only the data available in grid for further filtering?!