Simple implementation of C domain name resolution

This paper describes a simple implementation of C#domain name resolution.Share it for your reference.The implementation is as follows:

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;
namespace test1
{
 public partial class Form1 : Form
 {
  public Form1()
  {
   InitializeComponent();
  }
  private void buttonDns_Click(object sender, EventArgs e)
  {
   try
   {
    this.Cursor = Cursors.WaitCursor;
    // Resolve Host Name 
    IPHostEntry IPinfo = Dns.GetHostEntry(textBox1.Text);
    // Empty List Box 
    listBox1.Items.Clear();
    listBox2.Items.Clear();
    // display IP address 
    foreach (IPAddress IP in IPinfo.AddressList)
    {
     listBox1.Items.Add(IP.ToString());
    }
    // Show Alias 
    foreach (string alias in IPinfo.Aliases)
    {
     listBox2.Items.Add(alias);
    }
    // Show hostname 
    textBox2.Text = IPinfo.HostName;
   }
   catch (Exception ex)
   {
    MessageBox.Show(ex.Message);
   }
   finally
   {
    this.Cursor = Cursors.Default;
   }
  }
  private void Form1_Load(object sender, EventArgs e)
  {

  }
 }
}

I hope that the description in this paper will be helpful to everyone's C#program design.