If an application creates additional application domains, specifying a delegate for this event in those applications domains has no effect. NET Framework versions 1.0 and 1.1, this event occurs only for the default application domain that is created by the system when an application is started.
An exception is unhandled only if the entire stack for the thread has been unwound without finding an applicable exception handler, so the first place the event can be raised is in the application domain where the thread originated. However, the event is not necessarily raised in the application domain where the exception occurred.
This event can be handled in any application domain. NET Framework versions 1.0 and 1.1, application termination and debugging options are reported to the user before this event is raised, rather than after. Caution is advised, because program data can become corrupted when exceptions are not handled. If sufficient information about the state of the application is available, other actions may be undertaken - such as saving program data for later recovery. It allows the application to log information about the exception before the system default handler reports the exception to the user and terminates the application. Microsoft "This event provides notification of uncaught exceptions.
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