Vista - QoS and C#

Does anyone have links to implementing QoS in C#? According to MSDN, QoS
API was intended only for c++ developers. I think that is kinda sepratist
if you ask me.

Anyway, I did find a link where someone provided a VB version of the Winsock
API (http://www.thevbzone.com/modWINSOCK.bas).

I am looking for usage information. I think most specifically FLOWSPEC and
System.Net.Sockets.Socket.

My goal is to limit bandwidth each client uses when connecting to my server,
on the server end. I looking to avoid using TCP Remoting over HTTP to
accomplish this.

I am not a C++ guy, and no one on my team is able to support a C++ solution.
Any guidance you folks have would be wonderful.

Thanks