private async Task <int> AddSerials(List <SerialsDB> serials, int id)
        {
            int adds     = 0;
            int idSerial = _dispatchesService.GetLastIdDispatchSerials().Result;

            idSerial++;
            foreach (var s in serials)
            {
                var existingSerial = _serialService.GetSerialBySerial(s.Serial);
                var aux            = existingSerial.Result != null ? existingSerial.Result.Id : 0;
                if (aux != 0)
                {
                    var newItem = new DispatchSerials
                    {
                        Id         = idSerial,
                        Serial     = s.Serial.ToString(),
                        DispatchID = id
                    };
                    idSerial++;

                    var res = await _dispatchesService.UpdateDispatchSerialsTable(newItem);

                    adds += res;
                }
            }
            return(adds);
        }