public IEnumerable <Domain.OrderDetails> ShowOrderDetail()
 {
     return(_db.OrderDetails.Select(x => OrderDetailsMapper.Map(x)));
 }
 public IEnumerable <Domain.OrderDetails> ShowOrderDetailByUserId(int id)
 {
     yield return(_db.OrderDetails.Select(x => OrderDetailsMapper.Map(x)).Where(i => i.Id == id).FirstOrDefault());
 }