WCF UDP transport

Hi,

I'm trying to write a simple IM which will be based on WCF. For NAT
traversing I use STUN method to get public addresses of peers. That
implies the use of UDP transmission, but it is not implemented in
WCF.
I found the UDP Transport Sample and I managed to set up the service,
but i have problems to configure the client. Client receives the
address of service and has to configure the connection from the code,
without use of App.config file.


I'll be thankful for any help