public static string GetIPs(string args)
    {
        string[] combinedString;
        List<string> IPAdressenLijst = new List<string>();
        IPAddress[] ips = Dns.GetHostAddresses(Dns.GetHostName());

        foreach (IPAddress ip in ips)
        {
            if (ip.AddressFamily == AddressFamily.InterNetwork)
            {
                if (args == "program")
                {
                    IPAdressenLijst.Add("http://" + ip + ":1337/");
                    combinedString = IPAdressenLijst.ToArray();
                }
                else if (args == "webserver")
                {
                    IPAdressenLijst.Add("http://" + ip + ":1337/start/");
                    IPAdressenLijst.Add("http://" + ip + ":1337/stop/");
                    combinedString = IPAdressenLijst.ToArray();
                }
            }
        }
        return combinedString[0];
    }

static void Main(string[] args)
    {
        Console.WriteLine(DateTime.Now + " Press any key to exit.");
        //WebServer ws = new WebServer(SendResponse, "http://192.168.0.107:1337/", "http://localhost:1337/");
        WebServer ws = new WebServer(SendResponse, IPs.GetIPs("program"));
        ws.Run();
        Console.ReadKey();
        ws.Stop();
    }

public class WebServer
{
    //static string[] uris =
    //{
    //    "http://192.168.0.107:1337/start/",
    //    "http://192.168.0.107:1337/stop/"
    //};
    static string[] uris =
    {
        IPs.GetIPs("webserver")
    };
}