Question

I am developing a windows application and I need to find the IPv4 and IPv6 address of local machine. OS can be XP or Windows 7.

I got a solution for getting MAC address like,

string GetMACAddress()
{
    var macAddr =
        (
            from nic in NetworkInterface.GetAllNetworkInterfaces()
            where nic.OperationalStatus == OperationalStatus.Up
            select nic.GetPhysicalAddress().ToString()
        ).FirstOrDefault();

    return macAddr.ToString();
}

This is working in all OS.

What is the correct way to get IPv4 and IPv6 address that work on XP and WINDOWS 7?

Answer 1

string strHostName = System.Net.Dns.GetHostName();;
IPHostEntry ipEntry = System.Net.Dns.GetHostEntry(strHostName);
IPAddress[] addr = ipEntry.AddressList;
Console.WriteLine(addr[addr.Length-1].ToString());
if (addr[0].AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6)
            {
                Console.WriteLine(addr[0].ToString()); //ipv6
            }