DisposeWith.cs

DisposeWith.cs

       public static void DisposeWith( this IDisposable This, FrameworkElement control )
        {
            Observable.Merge
                (
                    control.Events().Unloaded,
                    control.Dispatcher.Events().ShutdownStarted
                )
                .Take(1)
                .Subscribe(e => This.Dispose());
        }