I have migrated my application that uses Telerik.Web.Design version 2009.3.1103.35 and Telerik.Web.UI version 2008.3.1125.35 dlls from 3.5 to 4.0. I am receiving the following error while doing any postback operation like cancel in RadGridView row. Pleas find the attached error screen shot.
I had refered to the patch provided by Simon at http://www.telerik.com/community/forums/aspnet-ajax/combobox/radcombobox-vs2010-bug.aspx
. But tht fix is not working for every form in my project.
Again, I have alos tried by replacing latest telerik dlls, but with this all web pages are working fine except the one in which i have used many telerik controls and that page is not even entering into Page_Load event.
Please guide us on this issue as I have a very urgent delivery next week.