大概是这样子，代码也没多少，直接上代码了。。

引入命名空间：

using System.Net;

 

完整代码：

namespace IPExample  {  public partial class Form1 : Form      {  public Form1()          {              InitializeComponent();          }  /// 
  /// 获得本机IP信息  /// 
  ///   ///          private void btn_ShowHostIPInfo_Click(object sender, EventArgs e)          {              lst_HostIPInfo.Items.Clear();  string name = Dns.GetHostName();              lst_HostIPInfo.Items.Add("本机主机名："+name);              IPHostEntry me = Dns.GetHostEntry(name);              lst_HostIPInfo.Items.Add("本机所有IP地址：");  foreach (IPAddress ip in me.AddressList)              {                  lst_HostIPInfo.Items.Add(ip);              }              IPAddress localIp = IPAddress.Parse("127.0.0.1");              IPEndPoint iep = new IPEndPoint(localIp, 80);              lst_HostIPInfo.Items.Add("IP端点：" + iep.ToString());              lst_HostIPInfo.Items.Add("IP端口：" + iep.Port);              lst_HostIPInfo.Items.Add("IP地址：" + iep.Address);              lst_HostIPInfo.Items.Add("IP地址族：" + iep.AddressFamily);              lst_HostIPInfo.Items.Add("可分配端口最大值：" + IPEndPoint.MaxPort);              lst_HostIPInfo.Items.Add("可分配端口最小值：" + IPEndPoint.MinPort);          }  /// 
  /// 获得服务器信息  /// 
  ///   ///          private void btn_ShowServerInfo_Click(object sender, EventArgs e)          {              lst_ServerIPInfo.Items.Clear();              IPHostEntry remoteHost = Dns.GetHostEntry(txt_ServerIPAddress.Text);              IPAddress[] remoteIp = remoteHost.AddressList;              IPEndPoint iep;  foreach (IPAddress ip in remoteIp)              {                  iep = new IPEndPoint(ip, 80);                  lst_ServerIPInfo.Items.Add(iep);              }          }      }  }

参考：http://www.wxzzz.com/?id=19