private void _uiAddDirectoryButton_Click(Object sender, RoutedEventArgs e)
 {
     var directoryBrowser = new DirectoryBrowser();
     if (directoryBrowser.ShowDialog() ?? false)
     {
         this.Directories.Add(directoryBrowser.Directory);
     }
 }
 private void ListBoxItem_MouseDoubleClick(Object sender, MouseButtonEventArgs e)
 {
     var directoryBrowser = new DirectoryBrowser(this._uiDirectoriesListBox.SelectedItem as Directory);
     directoryBrowser.ShowDialog();
     //if (!(Boolean)directoryBrowser.ShowDialog())
     //{
     //}
 }