C# Telnet 连接示例代码

using System;
using System.Collections.Generic;
using System.Text;

namespace MyTelnet
{
    class MySocket
    {
        private System.Net.Sockets.Socket socket;
        private bool closed;
        public MySocket()
        {
            socket = new System.Net.Sockets.Socket(System.Net.Sockets.AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp);
            closed = true;
        }
        public bool Connect(string address, string port)
        {
            try
            {

                System.Net.IPAddress ipaddr = System.Net.IPAddress.Parse(address);
                System.Net.IPEndPoint ipep = new System.Net.IPEndPoint(ipaddr, int.Parse(port));
                socket = new System.Net.Sockets.Socket(System.Net.Sockets.AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp);
                socket.Connect(ipep);
                int datalong = socket.Available;

                System.Threading.Thread.Sleep(100);
                while (datalong < socket.Available)
                {
                    datalong = socket.Available;

                    System.Threading.Thread.Sleep(100);
                }                
                if (datalong > 0)
                {
                    byte []recvdata = new byte[datalong];
                    byte[] senddat = new byte[datalong];
                    int p=0;
                    socket.Receive(recvdata, 0, datalong, System.Net.Sockets.SocketFlags.None);
                    for (int i = 0; i < datalong; i++)
                    {
                        if(recvdata[i]==255)
                        {

                            if (recvdata[i + 1] == 250)
                            {
                                senddat[p] = 255;
                                senddat[p+ 1] = 240;
                                senddat[p + 2] = recvdata[i + 2];
                                i = i + 2;
                                p = p + 3;
                            }
                            if (recvdata[i + 1] == 251)
                            {
                                senddat[p] = 255;
                                senddat[p + 1] = 253;
                                senddat[p + 2] = recvdata[i + 2];
                                i = i + 2;
                                p = p + 3;
                            }
                            if (recvdata[i + 1] == 253)