try
                    {
                        Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);  //向此网段发广播包
                          int UDPListenerPort = 8082;
                        IPAddress broadcast = IPAddress.Parse("192.168.0.255"); //此处根据IP及子网掩码改为相应的广播IP
                        string ts = "This is UPD string for sending";
                        byte[] sendbuf = Encoding.ASCII.GetBytes(ts);
                        IPEndPoint ep = new IPEndPoint(broadcast, UDPListenerPort);
                        s.SendTo(sendbuf, ep);

                    }
                    catch (Exception e)
                    {}


//csharp/4439