private void ListView_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            DependencyObject dp = (DependencyObject)e.OriginalSource;

            while ((dp != null) && (dp != (ListView)sender))
            {
                if (dp is ListViewItem)
                {
                    if (dp is FrameworkElement)
                    {
                        FrameworkElement frameworkElement = (FrameworkElement)dp;
                        if (frameworkElement.DataContext is LazyTrack)
                        {
                            sessionViewModel.playTrack((LazyTrack)frameworkElement.DataContext);
                        }
                    }
                    break;
                }
                dp = VisualTreeHelper.GetParent(dp);
            }
        }