public TrendsList GetYearlyTrends()
        {
            AuditServiceItem auditServiceItem = AuditService.Register("TrendsService", "GetYearlyTrends", "");
            AuditService.Start(auditServiceItem);

            TrendsList trendsList = new CategorizationService().GetTrends();

            AuditService.End(auditServiceItem);

            return trendsList;
        }
 protected void DisplayCategories()
 {
     CategorizationService categorizationService = new CategorizationService();
     CategoriesList categoriesList  = categorizationService.GetCategories();
     foreach (CategoryItem categoryItem in categoriesList)
     {
         TopicList topicList = categoryItem.TopicList;
         foreach (TopicItem topicItem in topicList)
         {
             DisplayTopic(topicItem);
         }
     }
 }