NOTE: I am using ASP.NET 1.1 with visual studio 2003.
I have repeater control with 250 records (100 per page). I was getting this error "Operation is not valid due to the current state of the object". After googling i increase the collection keys by putting this code into the web.config
<add key="aspnet:MaxHttpCollectionKeys" value="9999" />
But it did not resolve my problem. Could any one have idea what to do now?