private void OpenLoadingWindow()
    {
        loadingWindow = new LoadingView();
        loadingWindow.Closed += new EventHandler(LoadingWindow_Closed);

        _go = true;
        loadingWindow.ShowDialog();
    }

    public void OpenLoadingWindowInNewThread()
    {
        thread = new Thread(x => OpenLoadingWindow());
        thread.IsBackground = true;
        thread.SetApartmentState(ApartmentState.STA);
        thread.Start();

        lock (_locker)
        {
            Monitor.Pulse(_locker);
        }
    }

    public void CloseLoadingWindow()
    {
        lock (_locker)
            while (!_go)
                Monitor.Wait (_locker);

        if (loadingWindow != null)
        {
            loadingWindow.Dispatcher.BeginInvoke(DispatcherPriority.Normal, (Action)(() =>
            {
                _go = false;
                loadingWindow.Close();
                loadingWindow = null;
            }));
        }
    }