private void btnCancel_Click(object sender, RoutedEventArgs e) {
this._ShellListView.CancelNavigation();
this._ProgressTimer.Stop();
this.bcbc.SetProgressValue(this.bcbc.ProgressMaximum, TimeSpan.FromMilliseconds(750));
this.bcbc.ProgressMaximum = 100;
this.btnCancelNavigation.Visibility = Visibility.Collapsed;
this.btnGoNavigation.Visibility = Visibility.Visible;
}