//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);

      else

        broadcast (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 < ) {

        var msg = "Less than 1.";

        throw new ArgumentException (msg, "length");

      }

      var bytes = stream.ReadBytes (length);

      var len = bytes.Length;

      if (len == ) {

        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);

      else

        broadcast (Opcode.Binary, new MemoryStream (bytes), null);

    }

//c# 调用方式：
private void Broadcast(string msg, string type = "")

        {

            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));

        }