private static async Task TestBroadcastAsync()
        {
            try
            {
                IPAddress localIP;
                using (Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, 0))
                {
                    socket.Connect("8.8.8.8", 65530);
                    IPEndPoint endPoint = socket.LocalEndPoint as IPEndPoint;
                    localIP = endPoint.Address;
                }

                bool multicast = false;

                using (var socket = new Socket(localIP.AddressFamily, SocketType.Dgram, ProtocolType.Udp))
                {
                    if (!multicast)
                    {
                        socket.EnableBroadcast = true;
                    }
                    socket.ExclusiveAddressUse = false;

                    var dest = new IPEndPoint(IPAddress.Broadcast, 1900);
                    socket.Bind(new IPEndPoint(localIP, 0));
                    Debug.WriteLine($"Test-Bound ok to {localIP}");
                    
                    var bytes = new ArraySegment<byte>(new byte[1]);
                    await socket.SendToAsync(bytes, SocketFlags.None, dest);
                }
            } 
            catch (Exception ex)
            {
               Debug.WriteLine("Exception: " + ex.Message);
            }
        }