//向WebSocket服务中的每个客户端发送string数据public void Broadcast (string data){if (_state != ServerState.Start) {var msg = "管理器的当前状态为“未启动”|The current state of the manager is not Start.";throw new InvalidOperationException (msg);}if (data == null)throw new ArgumentNullException ("data");byte[] bytes;if (!data.TryGetUTF8EncodedBytes (out bytes)) {var msg = "无法进行utf-8编码|It could not be UTF-8-encoded.";throw new ArgumentException (msg, "data");}if (bytes.LongLength <= WebSocket.FragmentLength)broadcast (Opcode.Text, bytes, null);elsebroadcast (Opcode.Text, new MemoryStream (bytes), null);}

//向WebSocket服务中的每个客户端发送stream数据
public void Broadcast (Stream stream, int length){if (_state != ServerState.Start) {var msg = "The current state of the manager is not Start.";throw new InvalidOperationException (msg);}if (stream == null)throw new ArgumentNullException ("stream");if (!stream.CanRead) {var msg = "It cannot be read.";throw new ArgumentException (msg, "stream");}if (length < 1) {var msg = "Less than 1.";throw new ArgumentException (msg, "length");}var bytes = stream.ReadBytes (length);var len = bytes.Length;if (len == 0) {var msg = "No data could be read from it.";throw new ArgumentException (msg, "stream");}if (len < length) {_log.Warn (String.Format ("Only {0} byte(s) of data could be read from the stream.",len));}if (len <= WebSocket.FragmentLength)broadcast (Opcode.Binary, bytes, null);elsebroadcast (Opcode.Binary, new MemoryStream (bytes), null);}

//c# 调用方式：private void Broadcast(string msg, string type = "1"){var data = new JsonDto() { content = msg, type = type, name = "" };//发送广播数据，每个在线的客户端都可以收到信息
            Sessions.Broadcast(Newtonsoft.Json.JsonConvert.SerializeObject(data));}