c#关于怎么获得IP地址

IP
首先引用:
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;

            System.Net.IPAddress[] addlist=
                              System.Net.Dns.GetHostByName(Dns.GetHostName()).AddressList;
//Dns.GetHostName()获得主机名

            for (int i=0 ; i<addlist.Length;i++)
            ...{
                str+=addlist[i].ToString();
            }

            MessageBox.Show(str);