I recently installed the .NET Framework 4.5.1 RTM on a Windows Server 2012 Standard machine running IIS 8.0. There is a new option to suspend application pools when they time out instead of killing off the worker process call "Idle Time-out Action". I, however, do not see this new option. I have rebooted the server and tried uninstalling and re-installing .NET 4.5.1.


I think it is a new feature in IIS 8.5 rather than a feature of .NET 4.51

So you have to upgrade to Server 2012 R2 to get this feature.

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  • that's kind of what I was afraid of, unfortunately we're using Amazon Web Services and they currently do not offer Windows Server 2012 R2. – user2863126 Oct 24 '13 at 20:29

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