public async Task <List <Bill> > DeleteBillAsync(List <Bill> listBill)
{
List <Bill> result = new List <Bill>();
checkServiceCommunication();
List <Bill> gateWayResultList = await _gatewayOrder.DeleteBillAsync(listBill);
if (gateWayResultList.Count == 0)
{
foreach (Bill bill in listBill)
{
int returnValue = _dataSet.DeleteBill(bill.ID);
if (returnValue > 0)
{
result.Add(bill);
}
}
}
return(result);
}