WPF app closes itself after a while sometimes

The app is using my library which works using threads to do some operation; also it uses SIP VOIP library (obviously it is using threads). GUI is bound to interfaces of both libraries. I noticed a weird behavior of my app. Usually it works just fine but sometimes after some time (3-5 minutes) it suddenly cl开发者_如何学Gooses.

It is too irregular to debug it or diagnose.

Anyone had that kind of problem? Any idea what could be the reason for that?

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I would recommend you add an application level error handler so that you can log any errors that are occuring that you might be missing. It is as simple as

Application.Current.DispatcherUnhandledException += HandleApplicationException;

Here is an MSDN article that describes it: http://msdn.microsoft.com/en-us/library/system.windows.application.dispatcherunhandledexception.aspx