public MainWindow()
 {
     InitializeComponent();
     this.btnPointWay.Click += delegate
     {
         using (var ofd = new FolderBrowserDialog())
         {
             if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
             {
                 tView.Items.Add(FolderTraversal.CatalogInfo(ofd.SelectedPath));
             }
         }
     };
     this.tView.MouseDoubleClick += delegate {
         imageView.ItemsSource =
             FolderTraversal.GetFiles((string)(tView.SelectedItem as TreeViewItem).Tag);
     };
     this.imageView.SelectionChanged += delegate
     {
         (imageView.SelectedItem as ImagePair)?.View();
     };
 }