int recv; byte[] data = new byte[1024]; IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9050);//定义一网络端点 Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);//定义一个Socket newsock.Bind(ipep);//Socket与本地的一个终结点相关联 Console.WriteLine("Waiting for a client.."); IPEndPoint sender = new IPEndPoint(IPAddress.Any, port);//定义要发送的计算机的地址 EndPoint Remote = (EndPoint)(sender);// recv = newsock.ReceiveFrom(data, ref Remote);//接受数据 Console.WriteLine("Message received from{0}:", Remote.ToString()); Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv)); string welcome = "Welcome to my test server!"; data = Encoding.ASCII.GetBytes(welcome); newsock.SendTo(data, data.Length, SocketFlags.None, Remote); while (true) { data = new byte[1024]; recv = newsock.ReceiveFrom(data, ref Remote); Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv)); newsock.SendTo(data, recv, SocketFlags.None, Remote); }