private void ShowCategory(ResourceCategory category)
 {
     Nav.IsBackEnabled = true;
     Container.Navigate(typeof(ResourceItemListPage), new CategoryParameter(category, (ShowItemHandler) delegate(ResourceItem item)
     {
         ShowItem(item);
     }));
 }
 public CategoryParameter(ResourceCategory category, ShowItemHandler handler)
 {
     this.Category = category;
     this.Handler  = handler;
 }