Improving performance of multithreaded HttpWebRequests in .NET

Question

I am trying to measure the throughput of a webservice.

In order to do that, I have written a small tool that continuously sends requests and reads responses from a n

Answer 1

it could be the connection limit that has been imposed recently.

http://www.speedguide.net/read_articles.php?id=1497

and

http://www.mydigitallife.info/2007/04/09/windows-vista-tcpipsys-connection-limit-patch-for-event-id-4226/