public WinningItem AddWinningItem(WinningItem item)
 {
     dbContext.WinningItems.Add(item);
     dbContext.SaveChanges();
     return item;
 }
 public WinningItem UpdateWinningItem(WinningItem item)
 {
     dbContext.Entry(item).State = EntityState.Modified;
     this.dbContext.SaveChanges();
     return item;
 }