C# 异或校验两种方法

  
        public byte GetXor(byte[] data)
        {
            byte CheckCode = 0;
            int len = data.Length;
            for (int i = 0; i < len; i++)
            {
                CheckCode ^= data[i];
            }
            return CheckCode;
        }

        private string CRC(string cmdString)
        {
            try
            {
                //CRC寄存器
                int CRCCode = 0;
                //将字符串拆分成为16进制字节数据然后两位两位进行异或校验
                for (int i = 1; i < cmdString.Length / 2; i++)
                {
                    string cmdHex = cmdString.Substring(i * 2, 2);
                    if (i == 1)
                    {
                        string cmdPrvHex = cmdString.Substring((i - 1) * 2, 2);
                        byte t = (byte)Convert.ToInt32(cmdHex, 10);
                        byte tt = (byte)Convert.ToInt32(cmdPrvHex, 10);
                         CRCCode = (byte)Convert.ToInt32(cmdPrvHex, 10) ^ (byte)Convert.ToInt32(cmdHex, 10);
                    }
                    else
                    {
                        CRCCode = (byte)CRCCode ^ (byte)Convert.ToInt32(cmdHex, 16);
                    }
                }
                return Convert.ToString(CRCCode, 16).ToUpper();//返回16进制校验码
            }
            catch
            {
                throw;
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                // txtZhi.Text = CRC(textBox1.Text.Replace(" ", ""));
                byte[] bytes = new byte[6];
                bytes[0] = 36;
                bytes[1] = 50;
                bytes[2] = 50;
                bytes[3] = 48;
                bytes[4] = 50;
                bytes[5] = 57;
                string cmd= "$31064";//$ 3 1 064 14
                ASCIIEncoding ascii = new ASCIIEncoding();
                Byte[] encodedBytes = ascii.GetBytes(cmd);
                byte code = GetXor(encodedBytes);
                 
                txtZhi.Text = cmd+ Convert.ToString(code, 16).ToUpper();
            }
            catch
            {
                MessageBox.Show("校验失败,请检查字符串是否包含特殊字符");
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            ASCIIEncoding ascii = new ASCIIEncoding();
            Byte[] encodedBytes = ascii.GetBytes(textBox1.Text);
        }