String to TrippleDES

A simple C# code snippet to encode and decode a string using TripleDES.

public string Encode(string Key, string PlainText)
{
    TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();

    //mode of operation. there are other 4 modes. We choose ECB(Electronic code Book)
    tdes.Key = GenerateKey(Key);

    //padding mode(if any extra byte added)
    tdes.Mode = CipherMode.ECB;
    tdes.Padding = PaddingMode.PKCS7;

    //transform the specified region of bytes array to resultArray
    ICryptoTransform cTransform = tdes.CreateEncryptor();

    byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(PlainText);
    byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
    //Release resources held by TripleDes Encryptor

    tdes.Clear();
    //Return the encrypted data into unreadable string format

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

public string Decode(string Key, string CypherText)
{
    TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
    //set the secret key for the tripleDES algorithm

    tdes.Key = GenerateKey(Key);
    //mode of operation. there are other 4 modes. We choose ECB(Electronic code Book)

    byte[] toEncryptArray = Convert.FromBase64String(CypherText);

    tdes.Mode = CipherMode.ECB;
    //padding mode(if any extra byte added)

    tdes.Padding = PaddingMode.PKCS7;

    ICryptoTransform cTransform = tdes.CreateDecryptor();
    byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
    //Release resources held by TripleDes Encryptor                

    tdes.Clear();
    //return the Clear decrypted TEXT

    return UTF8Encoding.UTF8.GetString(resultArray);
}

NOTE: This code will only work on small strings (not large files) as the data is read into memory and not streamed/buffered.