BCD码、CRC校验码、和校验码的生成（C#.NET）

        public static string bcdToString(byte[] bcdNum)//bcd转string
        {
            string str="";
            for (int i = 0; i < 4;i++ )
            {
                str+=(0xff & (bcdNum[i] >> 4)) * 10 + (0xf & bcdNum[i]);
            }
            return str;
        }
        public static byte hjy(byte[] whole)//生成和校验码
        {
            byte temp = 0x00;
            for (int i = 0; i < whole.Length; i++)
            {
                temp += whole[i];
            }
            return temp;
        }
        public static int GetCRC(int nLength, byte[] pDaTa)//生成CRC校验码
        { 
            int g_Crc = 0xFFFF;
         for(int k = 0;k<nLength;k++)
         {
          g_Crc^=(int)pDaTa[k];
          for(int i = 0;i<8;i++)
          {
           if((g_Crc&0x01)==0x01)
           {
            g_Crc=g_Crc>>1;
            g_Crc ^=0xA001; 
           }
           else
           {
            g_Crc=g_Crc>>1;
           }
          }
         }
         return g_Crc;
        }