Is there any event on authentication ticket expired? ASP.NET

I need to do some cleaning when an authenticat开发者_如何学Pythonion ticket is expired. Is there any event that i can subscribe to?

Thanks for any suggestions, HF

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ASP.NET events happen when the user does something, causing a postback to the server. The authentication ticket expiring doesn't cause a postback, hence no way for you to know. You'll have to keep track of the time on your own.