“Validation of viewstate MAC failed. If this application is hosted by a Web Far…”

Question

i am facing the dreaded:

Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the

Answer 1

I used this Microsoft article to create my own machineKey validationkey and decryptionKey. As others have stated, this can be placed within the system.web section of web.config, though there are security concerns if other people get hold of the key.