How to display the IP Address of the Machine using C#?

Use the IPHostEntry.AddressList Property to get IP Address −

IPHostEntry myIP = Dns.GetHostEntry(hostName);
IPAddress[] address = myIP.AddressList;

Try the following code to display IP address −

Example

using System;
using System.Net;

class Program {
   static void Main() {
      String hostName = string.Empty;
      hostName = Dns.GetHostName();
      Console.WriteLine("Hostname: "+hostName);
      IPHostEntry myIP = Dns.GetHostEntry(hostName);

      IPAddress[] address = myIP.AddressList;
      for (int i = 0; i < address.Length; i++) {
         Console.WriteLine("IP Address {1} : ",address[i].ToString());
      }
      Console.ReadLine();
   }
}