C#中stream的read的使用

Question

public void WriteData() {
            string lineData = null;
            byte[] bytes = new byte[1024];
            int count = 0;
            /*System.Net.WebClient webClient = new System.Net.WebClient();            Stream stream = webClient.OpenWrite("http://127.0.0.1:8000");            StreamWriter writer = new StreamWriter(stream);
            writer.WriteLine("Hello world!");
            writer.Close();*/
            WebRequest webRequest = WebRequest.Create("http://127.0.0.1:8000");
             HttpWebRequest httpWebRequest = (HttpWebRequest)webRequest;
            WebResponse webResponse = (WebResponse)webRequest.GetResponse();
            Stream ReaderStream = webResponse.GetResponseStream();
            StreamReader reader = new StreamReader(ReaderStream);
           do{
                count = ReaderStream.Read(bytes, 0, bytes.Length);
                Console.WriteLine("count1 is:" + count);
            }while(count>0)            Console.WriteLine("count2 is:" + count);            webRequest.Credentials = CredentialCache.DefaultCredentials;            NetworkCredential networkCredential = new NetworkCredential("myusername","mayuserpass");
            webRequest.Credentials = networkCredential;
            Console.WriteLine("request url " + webRequest.RequestUri);
            Console.WriteLine("name:"+networkCredential.UserName+" pass:"+networkCredential.Password);
            Console.ReadKey();
            while(reader.ReadLine() != null){
                Console.WriteLine("reader data:"+reader.ReadLine());
                Console.ReadKey();
            }            Console.WriteLine("timeout " + httpWebRequest.Timeout + " AllowAutoRedirect " + httpWebRequest.AllowAutoRedirect);
            
            Console.ReadKey();
            WebHeaderCollection connection = webResponse.Headers;
            for (int i = 0; i < connection.Count; i++ )
            {
                Console.WriteLine("header data "+connection[i].ToString());
                Console.ReadKey();
            }
        }为什么读到最后count为中，在do中刚开始count不是0，最后count为0，读到最后什么也没有了，这是什么原因。初学者，请大家帮帮忙，谢谢

Answer 1

        public static string GetResponseText(string url)
        {
            string responseFromServer = null;
            Stream dataStream = null;
            StreamReader reader = null;
            try
            {
                WebRequest request = WebRequest.Create(url);
                request.Credentials = CredentialCache.DefaultCredentials;
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                if (response.StatusDescription == "OK")
                {
                    try
                    {
                        dataStream = response.GetResponseStream();
                        reader = new StreamReader(dataStream, Encoding.GetEncoding("GB2312"));
                        responseFromServer = reader.ReadToEnd();
                    }
                    finally
                    {
                        reader.Close();
                        dataStream.Close();
                    }
                }
                response.Close();
                return responseFromServer;
            }
            catch (Exception ex) 
            {
                return null;
            }
        }