using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Net.NetworkInformation;namespace test2{  public partial class Form1 : Form  {    public Form1()    {      InitializeComponent();    }    private void Form1_Load(object sender, EventArgs e)    {      IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();      TcpConnectionInformation[] connections = properties.GetActiveTcpConnections();      foreach (TcpConnectionInformation t in connections)      {        listBoxResult.Items.Add("本地端點： " + t.LocalEndPoint.Address);        listBoxResult.Items.Add("遠程端點: " + t.RemoteEndPoint.Address);        listBoxResult.Items.Add("狀態：" + t.State);      }    }  }}