using System;

using System.IO;

using System.Text;

using System.Security.Cryptography;

​

public class Program {

    public static void Main() {

        byte[] key1 = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };

        byte[] key2 = new byte[] { 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };

        byte[] data = Encoding.ASCII.GetBytes("CSharp Programming");

​

        Console.WriteLine("Original : {0}", Convert.ToBase64String(data));

        Aes aes = Aes.Create();

        aes.Key = key1;

​

        MemoryStream ms = new MemoryStream();

        ICryptoTransform ct = aes.CreateEncryptor();

​

        using (CryptoStream cs = new CryptoStream(ms, ct, CryptoStreamMode.Write)) {

            cs.Write(data, 0, data.Length);

        }

​

        byte[] enc = ms.ToArray();

        Console.WriteLine("Encrypted: {0}", Convert.ToBase64String(enc));

        ct.Dispose();

​

        // 다른 키를 사용해서 복호화해보도록 하죠!

        aes.Key = key2;

​

        MemoryStream result = new MemoryStream();

        ms = new MemoryStream(enc);

        ct = aes.CreateDecryptor();

​

        using (CryptoStream cs = new CryptoStream(ms, ct, CryptoStreamMode.Read)) {

            byte[] read = new byte[64];

            int c = cs.Read(read, 0, 64);

            result.Write(read, 0, c);

        }

​

        Console.WriteLine("Decrypted: {0}", Convert.ToBase64String(result.ToArray()));

    }

}