OAuth oauth = new OAuth("<AppKey>", "<AppSecret>", "<回调地址>");
WebProxy proxy = new WebProxy();
proxy.Address = new Uri("http://proxy.domain.com:3128");//代理服务器的地址及端口
proxy.Credentials = new NetworkCredential("<账号>", "<密码>");//如果有密码的话,你懂的
oauth.Proxy = proxy;
//然后就一样了,略~