Just an Update: I can reproduce, but still no fix.
I used to CCProxy to test having a proxy server.
The code worked fine, if I set CCProxy not to require authentication, but if I did, it wouldn't work. (Tried just username/password)
I tried changing from using NetworkCredential to the CredentialCache object, but still no dice.
Here's the code if anyone has any suggestions otherwise I'll keep plugging away at it:
System.Net.WebProxy proxy = new System.Net.WebProxy(config.ProxyServerAddress);
proxy.Credentials = new NetworkCredential(config.ProxyUserName, config.ProxyPassword, config.ProxyDomain));
proxy.Credentials = System.Net.CredentialCache.DefaultCredentials;
SnipplrProxy.Proxy = proxy;