public class RegisterHelp

    {

        /// <summary>

        /// CPU

        /// </summary>

        /// <returns></returns>

        public string GetCpu()

        {

            string strCpu = null;

            ManagementClass myCpu = new ManagementClass("win32_Processor");

            ManagementObjectCollection myCpuConnection = myCpu.GetInstances();
 

            foreach (ManagementObject myObject in myCpuConnection)

            {

                strCpu = myObject.Properties["Processorid"].Value.ToString();

                break;

            }

            return strCpu;

        }

        /// <summary>

        /// 網路卡

        /// </summary>

        /// <returns></returns>
 

        public string GetMacAddress()

        {

            try

            {

                string mac = "";

                ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");

                ManagementObjectCollection moc = mc.GetInstances();

                foreach (ManagementObject mo in moc)
 

                {

                    if ((bool)mo["IPEnabled"] == true)

                    {

                        mac = mo["MacAddress"].ToString();

                        break;

                    }

                }

                moc = null;

                mc = null;

                return mac;

            }

            catch

            {

                return "unknow";

            }

            finally

            {

            }

        }

        /// <summary>

        /// 硬碟

        /// </summary>

        /// <returns></returns>

        public string GetDiskID()

        {

            try

            {

                String HDid = "";

                ManagementClass mc = new ManagementClass("Win32_DiskDrive");

                ManagementObjectCollection moc = mc.GetInstances();

                foreach (ManagementObject mo in moc)

                {

                    HDid = (string)mo.Properties["Model"].Value;

                }

                moc = null;

                mc = null;

                return HDid;

            }

            catch

            {

                return "unknow";

            }

            finally

            {

            }

        }

        /// <summary>

        /// Base64解密

        /// </summary>

        /// <param name="input">需要解密的字串</param>

        /// <returns></returns>

        public string Base64Decrypt(string input)

        {

            return Base64Decrypt(input, new UTF8Encoding());

        }

        /// <summary>

        /// DES解密

        /// </summary>

        /// <param name="data">解密資料</param>

        /// <param name="key">8位字元的金鑰字串(需要和加密時相同)</param>

        /// <param name="iv">8位字元的初始化向量字串(需要和加密時相同)</param>

        /// <returns></returns>

        public string DESDecrypt(string data, string key, string iv)

        {

            byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(key);

            byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(iv);

            byte[] byEnc;

            try

            {

                byEnc = Convert.FromBase64String(data);

            }

            catch

            {

                return null;

            }

            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();

            MemoryStream ms = new MemoryStream(byEnc);

            CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);

            StreamReader sr = new StreamReader(cst);

            return sr.ReadToEnd();

        }

        /// <summary>

        /// Base64解密

        /// </summary>

        /// <param name="input">需要解密的字串</param>

        /// <param name="encode">字元的編碼</param>

        /// <returns></returns>

        public string Base64Decrypt(string input, Encoding encode)

        {

            return encode.GetString(Convert.FromBase64String(input));

        }

        public string Decode(string str)

        {

            string dtext = "";

            for (int i = ; i < str.Length; i++)

            {

                dtext = dtext + (char)(str[i] -  +  * );

            }

            return dtext;

        }

        public string GetText(RichTextBox richTextBox)

        {

            TextRange textRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);

            return textRange.Text;

        }

    }