private void AddUpdateBar(IProductUpdateService productUpdateService)
 {
     _updateBar = new ProductUpdateBar(productUpdateService);
     _updateBar.UpdateStarting += ExecutedClose;
     LayoutRoot.Children.Add(_updateBar);
     _updateBar.SizeChanged += OnHeaderBarSizeChanged;
 }
 private void RemoveUpdateBar()
 {
     if (_updateBar != null)
     {
         LayoutRoot.Children.Remove(_updateBar);
         _updateBar.CleanUp();
         _updateBar.UpdateStarting -= ExecutedClose;
         _updateBar.SizeChanged    -= OnHeaderBarSizeChanged;
         _updateBar = null;
     }
 }