Gets the current active IP address

ActiveIp.cs

using (var s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, System.Net.Sockets.ProtocolType.Udp))
{
    s.Bind(new IPEndPoint(IPAddress.Any, 0));
    s.Connect("google.com", 0);

    var ipaddr = s.LocalEndPoint as IPEndPoint;
    var addr = ipaddr?.Address?.ToString() ?? "";

    Console.WriteLine(addr);
}