Get local IP address of ethernet interface in C#

Question

Is there a reliable way to get the IPv4 address of the first local Ethernet interface in C#?

foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInter         


        

Answer 1

The following code gets the IPv4 from the preferred interface. This should also work inside virtual machines.

using System.Net;
using System.Net.Sockets;

public static void getIPv4()
    {
        try
        {
            using (Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, 0))
            {
                socket.Connect("10.0.1.20", 1337); // doesnt matter what it connects to
                IPEndPoint endPoint = socket.LocalEndPoint as IPEndPoint;
                Console.WriteLine(endPoint.Address.ToString()); //ipv4
            }
        }
        catch (Exception)
        {
            Console.WriteLine("Failed"); // If no connection is found
        }
    }