Ip Address in asp.net

Request.UserHostAddress;

IPHostEntry ip = Dns.GetHostByName ("www.vbcity.com"); 
IPAddress [] IpA = ipE.AddressList; 
for (int i = 0; i < IpA.Length; i++) 
{ 
    Console.WriteLine ("IP Address {0}: {1} ", i, IpA[i].ToString ()); 
} 

string sHostName = Dns.GetHostName (); 
IPHostEntry ipE = Dns.GetHostByName (sHostName); 
IPAddress [] IpA = ipE.AddressList; 
for (int i = 0; i < IpA.Length; i++) 
{ 
    Console.WriteLine ("IP Address {0}: {1} ", i, IpA[i].ToString ()); 
}

string ip = Request.Params["REMOTE_ADDR"].ToString();

using System;
using System.Management;

public class Sample
{
    public static void Main(string[] args)
    {
        ManagementObjectSearcher s =
            new ManagementObjectSearcher(
                "SELECT * FROM Win32_NetworkAdapterConfiguration");

        foreach (ManagementObject service in s.Get())
        {
            // show the instance
            Console.WriteLine(service.ToString());
           // u can get IP address from this array
        }
    }

}