代码如下：

        /// <summary>

        /// 去除byte数组头尾杂质(即不需要的数据)

        /// </summary>

        /// <param name="args"></param>

        static void Main(string[] args)

        {

            //---------------------去除头杂质---------------------------------

            byte[] listTemp = new byte[]

            {

				1, 2, 3, 4, 5, 6, 7, 8, 0x55, 0xaa, 6, 6, 6, 6, 6, 6, 6, 7, 7,

                7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9,7,8,8,

                1, 4, 3, 2, 4, 6, 7, 8, 9, 2, 1, 0x55, 0xaa, 1, 2, 3, 4, 6 ,2

            };

            int index = 0;

            while (true)

            {

                if (listTemp[index] != 0x55 && listTemp[index++] != 0xaa)

                    index++;

                else break;

            }

            byte[] listNew = new byte[listTemp.Length - index];

            Array.Copy(listTemp, index, listNew, 0, listTemp.Length - index);

            int count = 10;

            List<byte> finaly = new List<byte>();

            int lastStart = listNew.ToList<byte>().LastIndexOf(0x55);

            if (listNew[lastStart + 1] == 0xaa)

            {

                if ((listNew.Length) - (lastStart + 1) != count)

                {

                    byte[] listFinaly = new byte[lastStart];          //listFinaly 此处数组就是剔除了头尾杂质的

                    Array.Copy(listNew, 0, listFinaly, 0, lastStart);

                    finaly = listFinaly.ToList<byte>();

                }

            }

            Console.ReadLine();

        }