public PubackWrk(byte[] input)
        {
            this.puback = new Puback();

            puback.length      = input[0];
            puback.messageType = input[1];
            puback.topicId     = new byte[2];
            puback.messageId   = new byte[2];
            System.Buffer.BlockCopy(input, 2, puback.topicId, 0, 2);
            System.Buffer.BlockCopy(input, 4, puback.messageId, 0, 2);
            puback.ReturnCode = input[6];
        }
 public PubackWrk()
 {
     this.puback        = new Puback();
     puback.length      = Convert.ToByte("07", 16);
     puback.messageType = Convert.ToByte("0D", 16);
 }