using System.ComponentModel;

using System.Data; using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.Net;

using System.Management;

using System.Net.Sockets; using System.Collections; //using System.ComponentModel;using System.Windows.Forms;using System.Data;        

namespace test {    

 public partial class Form1 : Form    

{       

  public Form1()        

 {            

 InitializeComponent();     

    }         

  private void button1_Click(object sender, EventArgs e)        

 {          

string s="",mac="";                      

string hostInfo = Dns.GetHostName();                          

 System.Net.IPAddress[] addressList = Dns.GetHostByName(Dns.GetHostName()).AddressList;                      

  for (int i = 0; i < addressList.Length; i ++)                 

       {              

   s += addressList[i].ToString();                                   }                                            ManagementClass mc;          

  mc=new ManagementClass("Win32_NetworkAdapterConfiguration");                        ManagementObjectCollection moc=mc.GetInstances();                      

foreach(ManagementObject mo in moc)                     

  {          

      if(mo["IPEnabled"].ToString()=="True")                     

            mac=mo["MacAddress"].ToString();          

   this.textBox1.AppendText(mac + "\n\r\n\r");                

      }                  

  this.Text+=hostInfo;         

              this.Text+=s;       

               this.Text+=mac;      

    //  button1.Enabled=false;            button2.Focus();  

        }    

 }

}