Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster

Hi, Similar Threads : http://www.codeproject.com/Questions/321511/Validation-of-viewstate-MAC-failed https://support.microsoft.com/en-in/kb/2915218 http://stackoverflow.com/questions/5840899/asp-net-validation-of-viewstate-mac-failed

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Validation of viewstate MAC failed.

Sonu Pandey

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Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster

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