private string addForwardingRecord(List <List <string> > literalRecords) { List <List <ForwardingRecord> > records = new List <List <ForwardingRecord> >(); foreach (List <string> literalRecord in literalRecords) { records.Add(createRecord(literalRecord)); } ExecutionResult result = node.AddForwardingRecords(records); return(result.Result ? "OK" : "ERROR " + result.Msg); }