/// <summary>
 /// Agent that runs a scheduled task
 /// </summary>
 /// <param name="task">
 /// The invoked task
 /// </param>
 /// <remarks>
 /// This method is called when a periodic or resource intensive task is invoked
 /// </remarks>
 protected override void OnInvoke(ScheduledTask task)
 {
     try
     {
         //get the list of birthdays today and tomorrow
         GetRecentBirthdays();
         AppLog.CleanUpLogFile();
     }
     catch (Exception ex)
     {
         AppLog.WriteToLog(DateTime.Now, "Ërror in agent : " + ex.Message + ". Stack : " + ex.StackTrace, LogLevel.Error);
     }
     finally
     {
         NotifyComplete();
     }
 }