Find IP Address of Computer using C#

protected void Page_Load(object sender, EventArgs e)
{
     string _IP = null;
     string strHostName = System.Net.Dns.GetHostName();
     IPHostEntry ipEntry = System.Net.Dns.GetHostEntry(strHostName);
     foreach (IPAddress ipAddress in ipEntry.AddressList)
     {
          if (ipAddress.AddressFamily == AddressFamily.InterNetwork)
         {
              _IP = ipAddress.ToString();
          }
     }
     Response.Write(_IP);
}