Я хочу перенести следующий метод PHP на C#. Пожалуйста, помогите мне

function encryptData($input, $key_seed = "1234567890123") {
    $input = trim($input);
    $block = mcrypt_get_block_size('tripledes', 'ecb');
    $len = strlen($input);
    $padding = $block - ($len % $block);
    $input .= str_repeat(chr($padding), $padding);

    // generate a 24 byte key from the md5 of the seed 		 
    $key = substr(md5($key_seed), 0, 24);
    $iv_size = mcrypt_get_iv_size(MCRYPT_TRIPLEDES, MCRYPT_MODE_ECB);
    $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);

    // encrypt 		 
    $encrypted_data = mcrypt_encrypt(MCRYPT_TRIPLEDES, $key, $input, MCRYPT_MODE_ECB, $iv);
    // clean up output and return base64 encoded 
    $encrypted_data = base64_encode($encrypted_data);
    return $encrypted_data;
}

function decrypt($input, $key_seed = "1234567890123") {
    $input = base64_decode($input);
    $key = substr(md5($key_seed), 0, 24);

    $text = mcrypt_decrypt(MCRYPT_TRIPLEDES, $key, $input, MCRYPT_MODE_ECB, 'Mkd34ajdfka5');
    $block = mcrypt_get_block_size('tripledes', 'ecb');
    $packing = ord($text{strlen($text) - 1});

    if ($packing and ( $packing < $block)) {
        for ($P = strlen($text) - 1; $P >= strlen($text) - $packing; $P--) {
            if (ord($text{$P}) != $packing) {
                $packing = 0;
            }
        }
    }

    $text = substr($text, 0, strlen($text) - $packing);
    return $text;
}

private static string EncryptData(string input, string keySeed = "1234567890123")
{
    byte[] myEncryptedArray = Encoding.UTF8
        .GetBytes(input);

    MD5CryptoServiceProvider myMd5CryptoService = new
        MD5CryptoServiceProvider();

    byte[] mysecurityKeyArray = myMd5CryptoService.ComputeHash
        (Encoding.UTF8.GetBytes(keySeed));

    myMd5CryptoService.Clear();

    var myTripleDesCryptoService = new
        TripleDESCryptoServiceProvider();

    myTripleDesCryptoService.Key = mysecurityKeyArray;

    myTripleDesCryptoService.Mode = CipherMode.ECB;

    myTripleDesCryptoService.Padding = PaddingMode.PKCS7;

    var myCrytpoTransform = myTripleDesCryptoService
        .CreateEncryptor();

    byte[] myresultArray = myCrytpoTransform
        .TransformFinalBlock(myEncryptedArray, 0,
            myEncryptedArray.Length);

    myTripleDesCryptoService.Clear();

    return Convert.ToBase64String(myresultArray, 0,
        myresultArray.Length);
}

public static string Decrypt(string input, string keySeed = "1234567890123")
{
    byte[] myDecryptArray = Convert.FromBase64String
        (input);

    MD5CryptoServiceProvider myMd5CryptoService = new
        MD5CryptoServiceProvider();

    byte[] mysecurityKeyArray = myMd5CryptoService.ComputeHash
        (Encoding.UTF8.GetBytes(keySeed));

    myMd5CryptoService.Clear();

    var myTripleDesCryptoService = new
        TripleDESCryptoServiceProvider();

    myTripleDesCryptoService.Key = mysecurityKeyArray;

    myTripleDesCryptoService.Mode = CipherMode.ECB;

    myTripleDesCryptoService.Padding = PaddingMode.PKCS7;

    var myCrytpoTransform = myTripleDesCryptoService
        .CreateDecryptor();

    byte[] myresultArray = myCrytpoTransform
        .TransformFinalBlock(myDecryptArray, 0,
            myDecryptArray.Length);

    myTripleDesCryptoService.Clear();

    return Encoding.UTF8.GetString(myresultArray);
}