public IEnumerable<MessageId> GetAlreadyReceivedMessageIds()
{
Api.MoveBeforeFirst(session, recveivedMsgs);
while(Api.TryMoveNext(session, recveivedMsgs))
{
yield return new MessageId
{
SourceInstanceId = new Guid(Api.RetrieveColumn(session, recveivedMsgs, ColumnsInformation.RecveivedMsgsColumns["instance_id"])),
MessageIdentifier = new Guid(Api.RetrieveColumn(session, recveivedMsgs, ColumnsInformation.RecveivedMsgsColumns["msg_id"])),
};
}
}