User2080293737 posted
hi how to solve is error. this error occur when i open my web page after some 20 min when i clikc any button this error occure. how to solve this problem
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.
even i set
in <system.web> web.config file :
<pages validateRequest="false" enableEventValidation="false" viewStateEncryptionMode ="Never" />
