如何获取ste_cookie的值！

[红豆粥]

System.Net.CookieContainer cookie = new System.Net.CookieContainer();
httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
                httpWebRequest.CookieContainer = cookie;
                httpWebRequest.ContentType = contentType;
                httpWebRequest.ServicePoint.ConnectionLimit = maxTry;
                httpWebRequest.Referer = url;
                httpWebRequest.Accept = accept;
                httpWebRequest.UserAgent = userAgent;
                httpWebRequest.Method = "GET";
                httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
                cc.Add(httpWebResponse.Cookies);
                Stream responseStream = httpWebResponse.GetResponseStream();

这个代码为什么获取不到本机现有的Cookie？还有就是我希望获取set_cookie中的值！怎么获取啊？最好能给点代码！