Most optimum receiver - Prefetch how?

[Rajesh Khan]

I have something like the following code in the receiver. I am currently
dealing with 1000's of messages in perhaps less than 30 seconds.
I read in the broker manual that by default only one message is extracted
by the receiver from the broker however using prefetch I could receive more
than one message at a time.
How can I implement prefetch in my code any suggestions. I read that
setting the count value helps. Is there a way to find out how many messages
the receiver pulls out during each fetch from the broker? How can I
optimize my receiver to receive from queues. Any suggestions would be
appreciated.

C# receiver code.
 while (receiver_n.Fetch(ref message_n, timeout_n))
 {
                    try
                    {
                        message_n.GetContent(content);
                        session.Acknowledge(false); //Not Synchronous
                    }
                    catch (Exception ex)
                    {/*Exception*/}
 }