C#中用socket连接web服务器出现“远程主机易做图关闭了一个现有的连接”的错误，怎么处理

  public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }



        private void btnDownload_Click(object sender, EventArgs e)

        {

            string host = "www.baidu.com";

            int port = 80;



            string result = SocketSendReceive(host, port);

            Console.WriteLine(result);

        }

        private static Socket ConnectSocket(string server, int port)

        {

            Socket s = null;

            IPHostEntry hostEntry = null;



            // Get host related information.

            hostEntry = Dns.GetHostEntry(server);



            // Loop through the AddressList to obtain the supported AddressFamily. This is to avoid

            // an exception that occurs when the host IP Address is not compatible with the address family

            // (typical in the IPv6 case).

            foreach (IPAddress address in hostEntry.AddressList)

            {

                IPEndPoint ipe = new IPEndPoint(address, port);

                Socket tempSocket =

                    new Socket(ipe.AddressFamily, SocketType.Stream, ProtocolType.Tcp);



                tempSocket.Connect(ipe);



                if (tempSocket.Connected)

                {

                    s = tempSocket;

                    break;

                }

                else

                {

                    continue;

                }

            }

            return s;

        }



        // This method requests the home page content for the specified server.

        private static string SocketSendReceive(string server, int port)

        {

            string request = @"GET / HTTP/1.1

Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, */*

Accept-Language: zh-cn

UA-CPU: x86

Accept-Encoding: gzip, deflate

User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)

Host: www.baidu.com.cn

Connection: Keep-Alive";

            Byte[] bytesSent = Encoding.ASCII.GetBytes(request);

            Byte[] bytesReceived = new Byte[1024];



            // Create a socket connection with the specified server and port.

            Socket s = ConnectSocket(server, port);



            if (s == null)

                return ("Connection failed");





            // Send request to the server.





            // Receive the server home page content.

            int bytes = 0;

            string page = "Default HTML page on " + server + ":\r\n";



            // The following will block until te page is transmitted.

            s.Send(bytesSent, bytesSent.Length, 0);

            //do

            {

                bytes = s.Receive(bytesReceived, bytesReceived.Length, 0);//运行到这里卡住！一段时间后出现错误

                page = page + Encoding.ASCII.GetString(bytesReceived, 0, bytes);

            }

            //while (bytes == 1024);



            return page;

        }

补充：.NET技术 ,  C#

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