Fix bug causing unhandled exception when server is restarted and has a dynamic machine key
Fix bug causing unhandled exception when server is restarted and has a dynamic machine key

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branch : AsyncSitelets

Tarmil/websharper,intellifactory/websharper,Tarmil/websharper,intellifactory/websharper,Tarmil/websharper,intellifactory/websharper,Tarmil/websharper,intellifactory/websharper