Validation of viewstate MAC failed error

Question

i am getting the following error while running asp.net project Validation of viewstate MAC failed error.i just hosted my project in godaddy server..how to solve this error?.what is the cause of getting the error?.

Milan Prajapati · Answer

If you're running the same application on multiple computers you need to define the machine key explicitly in the machine.config file: Put it under the tag. o generate your own machineKey see this powershell script: http://support.microsoft.com/kb/2915218#AppendixA