public override string ToString()
{
var sb = new StringBuilder(200);
sb.AppendFormat("{0}（{1}）：是否连接={2}，当前状态={3}，Tunnel个数= {4}。\r\n",
this.GetType().Name, _rsspEndPoint.ID, this.Connected,
_currentState.GetType().Name, _tunnels.Count);
sb.AppendFormat("发送序号 = {0}，确认序号 = {1}。\r\n", _seqNoManager.SendSeq, _seqNoManager.AckSeq);
_tunnels.AsReadOnly().ToList().ForEach(p =>
{
sb.AppendFormat("{0}，本地EP={1}，远程EP={2}，是否连接={3}，是否握手={4}。\r\n",
p.GetType().Name, p.LocalEndPoint, p.RemoteEndPoint, p.Connected, p.IsHandShaken);
});
return(sb.ToString());
}
