BC_Logger_control.Form1.crcCalc C# (CSharp) Method

        byte crcCalc(String inString)
        {
            char[] instr=inString.ToCharArray(0, inString.Length);
            byte crc = 0x00;
            int i = 0;
            while (i < inString.Length)
            {
                for (byte tempI = 8; tempI>0; tempI--)
                {
                    byte sum = (byte) ((crc & 0xFF) ^ (instr[i] & 0xFF));
                    sum = (byte) ((sum & 0xFF) & 0x01);

                    crc >>= 1;
                    if (sum!=0)
                    {
                        crc ^= 0x8C;
                    }
                    instr[i] >>= 1;
                }
                i++;
            }
            return (crc);
        }