public override string ToString() {
return string.Format("MsPublish [{1:X4}.{3:X4}] {0}={2}", _val!=null?_val.name:"msg", TopicId, Data==null?"null":(BitConverter.ToString(Data)+"["+ Encoding.ASCII.GetString(Data.Select(z => (z<0x20 || z>0x7E)?(byte)'.':z).ToArray())+"]"), MessageId);
}
}