知道利用网卡的MAC算注册码的代码，能帮我写个注册机吗？

这是加密和解密代码
namespace Zddr.School.Register
{
    using System;
    using System.IO;
    using System.Security.Cryptography;
    using System.Text;    public class Crypto
    {
        public string DesDecrypt(string strText, string sDecrKey)
        {
            byte[] bytes = null;
            byte[] buffer2 = new byte[] { 0x12, 0x34, 0x56, 120, 0x90, 0xab, 0xcd, 0xef };
            byte[] buffer3 = new byte[strText.get_Length()];
            try
            {
                bytes = Encoding.get_UTF8().GetBytes(sDecrKey.Substring(0, 8));
                DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
                buffer3 = Convert.FromBase64String(strText);
                MemoryStream stream = new MemoryStream();
                CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(bytes, buffer2), 1);
                stream2.Write(buffer3, 0, buffer3.Length);
                stream2.FlushFinalBlock();
                Encoding encoding = new UTF8Encoding();
                return encoding.GetString(stream.ToArray());
            }
            catch (Exception exception)
            {
                return ("error:" + exception.get_Message() + "\r");
            }
        }        public string DesEncrypt(string strText, string strEncrKey)
        {
            byte[] bytes = null;
            byte[] buffer2 = new byte[] { 0x12, 0x34, 0x56, 120, 0x90, 0xab, 0xcd, 0xef };
            try
            {
                bytes = Encoding.get_UTF8().GetBytes(strEncrKey.Substring(0, 8));
                DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
                byte[] buffer3 = Encoding.get_UTF8().GetBytes(strText);
                MemoryStream stream = new MemoryStream();
                CryptoStream stream2 = new CryptoStream(stream, provider.CreateEncryptor(bytes, buffer2), 1);
                stream2.Write(buffer3, 0, buffer3.Length);
                stream2.FlushFinalBlock();
                return Convert.ToBase64String(stream.ToArray());
            }
            catch (Exception exception)
            {
                return ("error:" + exception.get_Message() + "\r");
            }
        }        public string RijndaelDecrypt(string strText, string strEncrKey)
        {
            try
            {
                byte[] bytes = Encoding.get_Default().GetBytes(strEncrKey.Substring(0, 8));
                byte[] buffer2 = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0 };
                Rijndael rijndael = Rijndael.Create();
                byte[] buffer3 = Convert.FromBase64String(strText);
                ICryptoTransform transform = rijndael.CreateDecryptor(bytes, buffer2);
                MemoryStream stream = new MemoryStream();
                CryptoStream stream2 = new CryptoStream(stream, transform, 1);
                stream2.Write(buffer3, 0, buffer3.Length);
                stream2.FlushFinalBlock();
                Encoding encoding = new UTF8Encoding();
                return encoding.GetString(stream.ToArray());
            }
            catch (Exception exception)
            {
                return exception.get_Message();
            }
        }        public string RijndaelEncrypt(string strText, string strEncrKey)
        {
            try
            {
                byte[] bytes = Encoding.get_Default().GetBytes(strEncrKey.Substring(0, 8));
                byte[] buffer2 = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0 };
                byte[] buffer3 = Encoding.get_UTF8().GetBytes(strText);
                ICryptoTransform transform = Rijndael.Create().CreateEncryptor(bytes, buffer2);
                MemoryStream stream = new MemoryStream();
                CryptoStream stream2 = new CryptoStream(stream, transform, 1);
                stream2.Write(buffer3, 0, buffer3.Length);
                stream2.FlushFinalBlock();
                return Convert.ToBase64String(stream.ToArray());
            }
            catch (Exception exception)
            {
                return exception.get_Message();
            }
        }
    }
}这是获取MAC的地址代码
namespace Zddr.School.Register
{
    using System;
    using System.Management;    public class MacAddress
    {
        private MacAddress()
        {
        }        internal static string GetMac()
        {
            ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_NetworkAdapterConfiguration");
            foreach (ManagementObject obj2 in searcher.Get())
            {
                if (obj2.get_Item("IPEnabled").ToString() == "True")
                {
                    return obj2.get_Item("MacAddress").ToString();
                }
            }
            return "";
        }
    }
}这是注册代码：namespace Zddr.School.Register
{
    using System;
    using System.Text;
    using Zddr.School.Common;
    using Zddr.School.Common.Security;    public class Reg
    {
        public static bool CheckReg(string regCode)
        {
            bool flag = false;
            try
            {
                Crypto crypto = new Crypto();
                string[] strArray = crypto.DesDecrypt(regCode, "123456789").Split(new char[] { ',' });
                string str2 = strArray[0];
                string str3 = strArray[1];
                string str4 = strArray[2];
                string str5 = strArray[3];
                if (GetRegCode() != str4)
                {
                    return flag;
                }
                DbHelper helper = DbHelper.Instance();
                helper.Open();
                string commandText = "select count(*) from Sys_RegInfo";
                if (*(helper.ExecuteScalar(commandText)) > 0)
                {
                    commandText = "update Sys_RegInfo set RegCode='" + regCode + "'";
                }
                else
                {
                    commandText = "insert into Sys_RegInfo(RegCode) values('" + regCode + "')";
                }
                helper.ExecuteNonQuery(commandText);
                helper.Close();
                flag = true;
            }
            catch
            {
                return false;
            }
            return flag;
        }        private static string Get3MD5(string str)
        {
            HashSignature signature = new HashSignature();
            string signatureStr = signature.GetSignatureStr(str);
            StringBuilder builder = new StringBuilder();
            for (int i = signatureStr.get_Length() - 1; i > -1; i--)
            {
                builder.Append(signatureStr.get_Chars(i));
            }
            signatureStr = signature.GetSignatureStr(builder.ToString());
            signatureStr = signature.GetSignatureStr(signatureStr);
            string str3 = "";
            for (int j = 0; j < signatureStr.get_Length(); j += 2)
            {
                if ((j > 0) && ((j % 8) == 0))
                {
                    str3 = str3 + "-";
                }
                str3 = str3 + signatureStr.get_Chars(j);
            }
            return str3;
        }        public static string GetCharacterCode()
        {
            string mac = MacAddress.GetMac();
            string str2 = "";
            string signatureStr = new HashSignature().GetSignatureStr(mac);
            for (int i = 0; i < signatureStr.get_Length(); i += 2)
            {
                str2 = str2 + signatureStr.get_Chars(i);
            }
            return str2;
        }        private static string GetRegCode()
        {
            return Get3MD5(GetCharacterCode());
        }        public static bool IsRegOk()
        {
            bool flag = false;
            DbHelper helper = DbHelper.Instance();
            helper.Open();
            string commandText = "select RegCode from Sys_RegInfo";
            object obj2 = helper.ExecuteScalar(commandText);
            if (obj2 != null)
            {
                string strText = obj2.ToString();
                try
                {
                    Crypto crypto = new Crypto();
                    string[] strArray = crypto.DesDecrypt(strText, "123456789").Split(new char[] { ',' });
                    string str4 = strArray[0];
                    string str5 = strArray[1];
                    string str6 = strArray[2];
                    string str7 = strArray[3];
                    if ((GetRegCode().CompareTo(str6) == 0) && ((Convert.ToDateTime(str4).AddMonths(Convert.ToInt32(str5)) >= DateTime.get_Now()) || (str5 == "-1")))
                    {
                        flag = true;
                    }
                }
                catch
                {
                }
            }
            helper.Close();
            return flag;
        }
    }
}怎么写注册机呀？我就是对这个方面很弱！麻烦高手帮个忙？我的电子