/// <summary>    /// 字节缓冲器    /// </summary>    public class ByteQueue    {        private List<byte> m_buffer = new List<byte>();        public bool Find()        {            if (m_buffer.Count == 0)                return false;            int HeadIndex = m_buffer.FindIndex(o => o == 0xAA);            if (HeadIndex == -1)            {                m_buffer.Clear();                return false; //没找到AA            }            else if (HeadIndex != 0) //不为开头移掉之前的字节            {                if (HeadIndex > 1)                    m_buffer.RemoveRange(0, HeadIndex);            }            int length= GetLength();            if (m_buffer.Count <length)            {                return false;            }            int TailIndex = m_buffer.FindIndex(o => o == 0x55); //查找55的位置            if (TailIndex == -1)            {                //这一步为防止连发一个AA开头的包后，没发55，而又发了一个AA                int head = m_buffer.FindLastIndex(o => o == 0xAA);                if (head > -1)                {                    m_buffer.RemoveRange(0, head);                }                return false;            }            else if (TailIndex + 1 != length) //计算包尾是否与包长度相等            {                m_buffer.RemoveRange(0, TailIndex);                return false;            }            return true;        }        /// <summary>        /// 命令类型        /// </summary>        /// <returns></returns>        public byte Cmd()        {            if (m_buffer.Count >= 2)            {                return m_buffer[1];            }            return 0;        }        /// <summary>        /// 序号        /// </summary>        /// <returns></returns>        public byte Number()        {            if (m_buffer.Count >= 3)            {                return m_buffer[2];            }            return 0;        }        /// <summary>        /// 包长度        /// </summary>        /// <returns></returns>        public int GetLength()        {            int len = 5;//AA 命令类型 序号 校验和 55            if (m_buffer.Count >= 3)            {                switch (m_buffer[2]) //第三字节为序号                {                     case 0x00: //序号                        return len + 16;                    case 0x01: //序号                        return len + 10;                    case 0x02: //序号                        return len + 12;                }            }            return 0;        }        /// <summary>        /// 提取数据        /// </summary>        public void Dequeue(byte[] buffer, int offset,int size)        {            m_buffer.CopyTo(0,buffer,offset,size);            m_buffer.RemoveRange(0, size);        }        /// <summary>        /// 队列数据        /// </summary>        /// <param name="buffer"></param>        public void Enqueue(byte[] buffer)        {            m_buffer.AddRange(buffer);        }    }

 private ByteQueue queue = new ByteQueue(); private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)        {            int len = serialPort1.BytesToRead;            if (len > 0)            {                byte[] temp = new byte[len];                serialPort1.Read(temp, 0, len);                queue.Enqueue(temp);                while (queue.Find()) //while可处理同时接收到多个AA ... 55 ,AA...55的包                {                    int length = queue.GetLength();                    byte[] readBuffer = new byte[len];                    queue.Dequeue(readBuffer, 0, length);                    OnReceiveData(readBuffer); //<这里自己写一个委托吧就OK了                }            }        }