Some of you may faced this nasty error. May be while setting up a new web server or after upgrading an ASP.NET project. Well, I didnt not find any 100% good fix for this issue yet. As far as I know, this error occurs only for who have low-speed internet connection and those who do ’something’ before the page load completed. Here are two ways which /may/ help you resolve this issue. Well this worked for me:


1) Do not let the end-user touch keyboard or mouse before the page load is complete. For this you can use some “loading…” technique.

2) Try adding this to your web.config:

 <pages enableViewStateMac=“false” 
        enableEventValidation=“false”
        viewStateEncryptionMode=“Never” 
        maxPageStateFieldLength=“200″ />