Rhino.Queues.Storage.SenderActions.GetMessagesToSend C# (CSharp) Method

        public IEnumerable<PersistentMessageToSend> GetMessagesToSend()
        {
            Api.MoveBeforeFirst(session, outgoing);

            while (Api.TryMoveNext(session, outgoing))
            {
                var address = Api.RetrieveColumnAsString(session, outgoing, ColumnsInformation.OutgoingColumns["address"]);
                var port = Api.RetrieveColumnAsInt32(session, outgoing, ColumnsInformation.OutgoingColumns["port"]).Value;

                var bookmark = new MessageBookmark();
                Api.JetGetBookmark(session, outgoing, bookmark.Bookmark, bookmark.Size, out bookmark.Size);

                yield return new PersistentMessageToSend
                {
                    Id = new MessageId
                    {
                        SourceInstanceId = instanceId,
                        MessageIdentifier = new Guid(Api.RetrieveColumn(session, outgoing, ColumnsInformation.OutgoingColumns["msg_id"]))
                    },
                    OutgoingStatus = (OutgoingMessageStatus)Api.RetrieveColumnAsInt32(session, outgoing, ColumnsInformation.OutgoingColumns["send_status"]).Value,
                    Endpoint = new Endpoint(address, port),
                    Queue = Api.RetrieveColumnAsString(session, outgoing, ColumnsInformation.OutgoingColumns["queue"], Encoding.Unicode),
                    SubQueue = Api.RetrieveColumnAsString(session, outgoing, ColumnsInformation.OutgoingColumns["subqueue"], Encoding.Unicode),
                    SentAt = DateTime.FromOADate(Api.RetrieveColumnAsDouble(session, outgoing, ColumnsInformation.OutgoingColumns["sent_at"]).Value),
                    Data = Api.RetrieveColumn(session, outgoing, ColumnsInformation.OutgoingColumns["data"]),
                    Bookmark = bookmark
                };
            }
        }