on post back we are facing below error only on IE8 and not in IE9, FireFox -
Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request.
Refer below details about ASP.NET 3.5 Web Application.
1. We have previously project structure as below-
"TestProject" is Web Project:
"Sample2" is folder and it is part of TestProject Web Project :
2. Modified project structure-
"AllPages" is folder part of TestProject Web Project:
Please suggest solution.