C# rijdael test

rijndael_test.cs

[Test]
public void rijndael_test()
{
    var rijndaelAlg = Rijndael.Create();
    byte[] data = Encoding.UTF8.GetBytes("1234567890abcdef");
    rijndaelAlg.Key = new ASCIIEncoding().GetBytes("pass123pass123pass123pass123pass");
    rijndaelAlg.IV = new ASCIIEncoding().GetBytes("1234567890abcdef");
    using (var memoryStream = new MemoryStream())
    using (var cryptoStream = new CryptoStream(memoryStream, rijndaelAlg.CreateEncryptor(), CryptoStreamMode.Write))
    {
        cryptoStream.Write(data, 0, data.Length);
        cryptoStream.FlushFinalBlock();
        var cipherTextBytes = memoryStream.ToArray();
        Console.WriteLine(Convert.ToBase64String(cipherTextBytes));       
    }
}