C# 根据主机名称获得IP

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;

namespace GetIp
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

    private void Form1_Load(object sender, EventArgs e)
    {
           string  name=    Dns.GetHostName();
      //  IPHostEntry Iphost=    Dns.GetHostByName(name);
        //  IPAddress Ip = Iphost.AddressList[0];
        //  textBox1.Text = Ip.ToString();

        IPHostEntry en= Dns.GetHostEntry(name); //获得主机名称；
         for(int i = 0; i 
}