Apache.NMS.ActiveMQ.MessageConsumer.MakeAckForAllDeliveredMessages C# (CSharp) Method

        private MessageAck MakeAckForAllDeliveredMessages(AckType type)
        {
            lock(this.dispatchedMessages)
            {
                if(this.dispatchedMessages.Count == 0)
                {
                    return null;
                }

                MessageDispatch dispatch = this.dispatchedMessages.First.Value;
                MessageAck ack = new MessageAck();

                ack.AckType = (byte) type;
                ack.ConsumerId = this.info.ConsumerId;
                ack.Destination = dispatch.Destination;
                ack.LastMessageId = dispatch.Message.MessageId;
                ack.MessageCount = this.dispatchedMessages.Count;
                ack.FirstMessageId = this.dispatchedMessages.Last.Value.Message.MessageId;

                return ack;
            }
        }