public ConnackWrk(byte[] input)
        {
            this.connack = new Connack();

            connack.length      = input[0];
            connack.messageType = input[1];
            connack.returnCode  = input[2];
        }
 public ConnackWrk()
 {
     this.connack        = new Connack();
     connack.length      = Convert.ToByte("03", 16);
     connack.messageType = Convert.ToByte("05", 16);
 }