7
Posted on 2:02 AM by Softminer and filed under

This problem happens when your asp.net application runs on web farms
Adding enableViewStateMac="false" to webform may solve the problem but it's not recommended.

BY IIS 7


<?xml version="1.0" encoding="UTF-8"?> 
<configuration> 
    <system.web> 
        <machineKey decryptionKey="xx,IsolateApps" validationKey="xxx,IsolateApps" /> 
    </system.web> 
</configuration>
To generate using Power shell use this instruction http://support.microsoft.com/kb/2915218 Copy and paster powershell script into file, while running you may get security error. To remove security try x86 Open C:\Windows\system32\cmd.exe Run the command powershell Set-ExecutionPolicy RemoteSigned x64 Open C:\Windows\SysWOW64\cmd.exe Run the command powershell Set-ExecutionPolicy RemoteSigned and to set back to default powershell Set-ExecutionPolicy Restricted Power shell Execution Policies