Windows.MainWindow.OnClosed C# (CSharp) Method

        protected override void OnClosed(EventArgs e)
        {
            _callback = null;
            if (_clientId > 0)
            {
                MicroconeAPI.CloseClientConnection(_clientId);
            }
            MicroconeAPI.UnregisterPnpNotification();
            base.OnClosed(e);
            System.Environment.Exit(0);
        }