using System;

using System.Text;

using System.Security.Cryptography;

​

public class Program

{

    private const string CrypteurKey128 = "1234567890123456";

    private const string CrypteurKey192 = "123456789012345678901234";

    private const string CrypteurKey256 = "12345678901234567890123456789012";

    public static void Main()

    {

        byte[] resultArray;

        byte[] inputArray = Encoding.UTF8.GetBytes("test");

        using (var aes = new AesManaged())

        {

            aes.Key = Encoding.UTF8.GetBytes(CrypteurKey256);

            aes.Mode = CipherMode.ECB;

            aes.Padding = PaddingMode.PKCS7;

            ICryptoTransform cTransform = aes.CreateEncryptor(aes.Key, aes.IV);

            resultArray = cTransform.TransformFinalBlock(inputArray, 0, inputArray.Length);

            aes.Clear();

        }

​

        Console.WriteLine(Convert.ToBase64String(resultArray, 0, resultArray.Length));

    }

}