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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-
"TestProject"(Web Project)
"AllPages" is folder part of TestProject Web Project:

Please suggest solution.
Posted 19-Sep-12 6:23am
aidin Tajadod at 19-Sep-12 18:51pm
do you change viewstate in you code? at 20-Sep-12 3:17am
thanks for your attention.
We have not changed viewstate in code.
aidin Tajadod at 20-Sep-12 13:43pm
I don't have any particular problem like this with IE8.
Please share some codes.

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