using System;

using System.IO;

using System.Security.Cryptography;

using System.Text;

​

public class Program

{

    private static string password = "W1S2020";

    private static readonly byte[] IV = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };

    private const int BlockSize = 128;

​

    public static void Main()

    {

        //texto a encriptar

        string texto = "texto";

​

        byte[] bytes = Encoding.Unicode.GetBytes(texto);

        //Encrypt

        SymmetricAlgorithm crypt = Aes.Create();

        HashAlgorithm hash = MD5.Create();

        crypt.BlockSize = BlockSize;

        crypt.Key = hash.ComputeHash(Encoding.Unicode.GetBytes(password));

        crypt.IV = IV;

​

        using (MemoryStream memoryStream = new MemoryStream())

        {

            using (CryptoStream cryptoStream =

               new CryptoStream(memoryStream, crypt.CreateEncryptor(), CryptoStreamMode.Write))

            {

                cryptoStream.Write(bytes, 0, bytes.Length);

            }

            Console.WriteLine(Convert.ToBase64String(memoryStream.ToArray()));

        }

    }

}