public void Execute(IJobExecutionContext context)
 {
     using (var db = new EventZoneEntities())
     {
         var listRank = db.EventRanks.ToList();
         foreach (var item in listRank)
         {
             item.Score = EventDatabaseHelper.Instance.CalculateEventScore(item.EventId);
         }
         db.SaveChanges();
     };
 }