ASP.NET Validation of Viewstate MAC failed

Sumeet
 
on Oct 10, 2014 07:08 AM
4169 Views

Sir,

When i keep the .aspx page open or iden for long period on browser and then clicks on button after some time , it shows me the

error as "Validation of Viewstate MAC failed. Auto generate cannot be used in cluster."

how should i avoid this... ?

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