ShutdownServiceClosedAsync Property

Occurs when the project is already closed and the rest of the shutdown procedure starts to happen. This is a weak event in order to prevent garbage collection of item that subscribe to this event. The event is raised during stage 3 OnClosingStage3_SignalShutdownToken. The tasks are executed in parallel on thread-pool threads, thus make sure that the event handlers are thread-safe.

public WeakAsynchronousEvent ClosedAsync { get; }