下面代码内容是关于C#进行端口扫描的的代码，应该是对码农们有一些好处。

using System;using System.Net;using System.Net.Sockets;using System.Collections;namespace PortScan{ class Program { static void Main(string[] args) { IPAddress ip; int startPort, endPort; { Console.ReadKey(); } } #region 从命令行参数 中提取端口 + static bool GetPortRange(string[] args, out int startPort, out int endPort) private static bool GetPortRange(string[] args,out IPAddress ip, out int startPort, out int endPort) { ip = null; startPort = endPort = 0; if (args.Length != 0 && (args[0] == "/?" || args[0] == "/help")) { Console.WriteLine("Scan port from startPort to endPort of the host specified by the IPAddress."); Console.WriteLine("Command Format:"); Console.WriteLine("PortScan IPAddress startPort endPort"); Console.WriteLine("For example:"); Console.WriteLine("PortScan 127.0.0.1 1 1024"); return false; } if (args.Length == 3) { if (IPAddress.TryParse(args[0],out ip) && int.TryParse(args[1], out startPort) && int.TryParse(args[2], out endPort)) { return true; } else { Console.WriteLine("参数格式不正确！"); return false; } } else { Console.WriteLine("参数数目不正确！"); return false; } } #endregion static void Scan(IPAddress ip, int startPort, int endPort) { Random rand = new Random((int)DateTime.Now.Ticks); Console.WriteLine("Begin Scan..."); for (int port = startPort; port < endPort; port++) { Socket scanSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP); do { try { scanSocket.Bind(new IPEndPoint(IPAddress.Any, rand.Next(65535))); break; } catch { } } while (true); try { scanSocket.BeginConnect(new IPEndPoint(ip, port), ScanCallBack, new ArrayList() { scanSocket, port}); } catch { continue; } } Console.WriteLine("Port Scan Completed!"); } static void ScanCallBack(IAsyncResult result) { ArrayList arrList = (ArrayList)result.AsyncState; Socket scanSocket = (Socket)arrList[0]; int port = (int)arrList[1]; if (result.IsCompleted && scanSocket.Connected) { Console.WriteLine("port {0,5}tOpen.", port); } else { } scanSocket.Close(); } }}