private void DoCategoryTypeSearch()
 {
     if (this.m_CategorySearchType == "Recent Cases")
     {
         MethodResult methodResult = BillingLogCollection.GetByRecentPostedCases();
         if (methodResult.Success == true)
         {
             this.m_BillingLogCollection = (BillingLogCollection)methodResult.Result;
             this.NotifyPropertyChanged(string.Empty);
         }
         else
         {
             methodResult.ShowMethodResult();
         }
     }
 }