Vista - Setting proxy credentials and proxy server details

Has anyone got any referece documentation on how to set the proxy
credentials and set proxy server details in WCF proxies? Basically I want to
do the following two scenarios we have done in pre-WCF environments:



//Set proxy credentials

ServiceB.ServiceB remoteService = new ServiceB.ServiceB();

NetworkCredential credential = new NetworkCredential("research", "nicetry",
"willyxpacer");

remoteService.PreAuthenticate = true;

remoteService.Credentials = credential;



// Set proxy details

remoteService.Proxy = System.Net.WebProxy.GetDefaultProxy();

remoteService.Proxy.Credentials = CredentialCache.DefaultCredentials;