using System;

using System.IO;

using System.Security.Cryptography;

​

public class Program

{

    public static void Main()

    {

        var provider = new TripleDESCryptoServiceProvider();

        var data = "Here is some data to encrypt.";

        var bytes = Encrypt(data, provider);

        var final = Decrypt(bytes, provider);

        Console.WriteLine(final);

    }

​

    public static byte[] Encrypt(string data, TripleDESCryptoServiceProvider provider)

    {

        using (var stream = new MemoryStream())

        {

            var encryptor = provider.CreateEncryptor(provider.Key, provider.IV);

            using (var cryptoStream = new CryptoStream(stream, encryptor, CryptoStreamMode.Write))

                using (var writer = new StreamWriter(cryptoStream))

                    writer.WriteLine(data);

            return stream.ToArray();

        }

    }

​

    public static string Decrypt(byte[] data, TripleDESCryptoServiceProvider provider)

    {

        using (var stream = new MemoryStream(data))

        {

            var decryptor = provider.CreateDecryptor(provider.Key, provider.IV);

            using (var cryptoStream = new CryptoStream(stream, decryptor, CryptoStreamMode.Read))

                using (var reader = new StreamReader(cryptoStream))

                    return reader.ReadToEnd();

        }

    }

}