Example to Encrypt and Decrypt using DES Algorithm using C# in ASP.Net

Dear Experts,

I am working on encryption and decryption of string. I find the class on the internet but that class is not working. Please find the code below. Please let me know how to call this class on Button_Click Event. I already tried this link http://www.aspsnippets.com/Articles/AES-Encryption-Decryption-Cryptography-Tutorial-with-example-in-ASPNet-using-C-and-VBNet.aspx.

Thanks

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using  System.Text;
using System.Security.Cryptography;
using System.Configuration;


/// <summary>
/// Summary description for CryptorEngine
/// </summary>
//public class CryptorEngine
//{
//    public CryptorEngine()
//    {
    
//     public static string Encrypt(string toEncrypt, bool useHashing)
//        {
//            byte[] keyArray;
//            byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);

//            System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
//            // Get the key from config file
//            string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));
//            //System.Windows.Forms.MessageBox.Show(key);
//            if (useHashing)
//            {
//                MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
//                keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
//                hashmd5.Clear();
//            }
//            else
//                keyArray = UTF8Encoding.UTF8.GetBytes(key);

//            TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
//            tdes.Key = keyArray;
//            tdes.Mode = CipherMode.ECB;
//            tdes.Padding = PaddingMode.PKCS7;

//            ICryptoTransform cTransform = tdes.CreateEncryptor();
//            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
//            tdes.Clear();
//            return Convert.ToBase64String(resultArray, 0, resultArray.Length);
//        }
//        /// <summary>
//        /// DeCrypt a string using dual encryption method. Return a DeCrypted clear string
//        /// </summary>
//        /// <param name="cipherString">encrypted string</param>
//        /// <param name="useHashing">Did you use hashing to encrypt this data? pass true is yes</param>
//        /// <returns></returns>
//        public static string Decrypt(string cipherString, bool useHashing)
//        {
//            byte[] keyArray;
//            byte[] toEncryptArray = Convert.FromBase64String(cipherString);

//            System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
//            //Get your key from config file to open the lock!
//            string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));
            
//            if (useHashing)
//            {
//                MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
//                keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
//                hashmd5.Clear();
//            }
//            else
//                keyArray = UTF8Encoding.UTF8.GetBytes(key);

//            TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
//            tdes.Key = keyArray;
//            tdes.Mode = CipherMode.ECB;
//            tdes.Padding = PaddingMode.PKCS7;

//            ICryptoTransform cTransform = tdes.CreateDecryptor();
//            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
                        
//            tdes.Clear();
//            return UTF8Encoding.UTF8.GetString(resultArray);
//        }
//    }
namespace EnCryptDecrypt
{
    public class CryptorEngine
    {

        /// <summary>
        /// Encrypt a string using dual encryption method. Return a encrypted cipher Text
        /// </summary>
        /// <param name="toEncrypt">string to be encrypted</param>
        /// <param name="useHashing">use hashing? send to for extra secirity</param>
        /// <returns></returns>
        public static string Encrypt(string toEncrypt, bool useHashing)
        {
            byte[] keyArray;
            byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);

            System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
            // Get the key from config file
            string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));
            //System.Windows.Forms.MessageBox.Show(key);
            if (useHashing)
            {
                MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
                keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
                hashmd5.Clear();
            }
            else
                keyArray = UTF8Encoding.UTF8.GetBytes(key);

            TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
            tdes.Key = keyArray;
            tdes.Mode = CipherMode.ECB;
            tdes.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = tdes.CreateEncryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            tdes.Clear();
            return Convert.ToBase64String(resultArray, 0, resultArray.Length);
        }
        /// <summary>
        /// DeCrypt a string using dual encryption method. Return a DeCrypted clear string
        /// </summary>
        /// <param name="cipherString">encrypted string</param>
        /// <param name="useHashing">Did you use hashing to encrypt this data? pass true is yes</param>
        /// <returns></returns>
        public static string Decrypt(string cipherString, bool useHashing)
        {
            byte[] keyArray;
            byte[] toEncryptArray = Convert.FromBase64String(cipherString);

            System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
            //Get your key from config file to open the lock!
            string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));

            if (useHashing)
            {
                MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
                keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
                hashmd5.Clear();
            }
            else
                keyArray = UTF8Encoding.UTF8.GetBytes(key);

            TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
            tdes.Key = keyArray;
            tdes.Mode = CipherMode.ECB;
            tdes.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = tdes.CreateDecryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            tdes.Clear();
            return UTF8Encoding.UTF8.GetString(resultArray);
        }
    }
    
}