using System;

using System.IO;

using System.Security.Cryptography; 

using System.Text;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(CreateSerial("Hello World"));

    }

    private string CreateSerial(string input)

    {

        string passPhrase = "Adv@nceU5er";

        string saltValue = "U5erAdv@nce";

        string hashAlgorithm = "SHA1";

        int passwordIterations = 2;

        string initVector = "@1B2c3D4e5F6g7H8";

        int keySize = 256;

        return Encrypt(input, passPhrase, saltValue, hashAlgorithm, passwordIterations, initVector, keySize);

    }

​

    public string Encrypt(string plainText, string passPhrase, string saltValue, string hashAlgorithm, int passwordIterations, string initVector, int keySize)

    {

        byte[] bytes = Encoding.ASCII.GetBytes(initVector);

        byte[] bytes2 = Encoding.ASCII.GetBytes(saltValue);

        byte[] array = Encoding.ASCII.GetBytes(plainText);

        PasswordDeriveBytes passwordDeriveBytes = new PasswordDeriveBytes(passPhrase, bytes2, hashAlgorithm, passwordIterations);

        byte[] bytes3 = passwordDeriveBytes.GetBytes((int) Math.Round((double) keySize/8.0));

        ICryptoTransform transform = new RijndaelManaged

        {

            Mode = CipherMode.CBC

        }.CreateEncryptor(bytes3, bytes);

        MemoryStream memoryStream = new MemoryStream(array);

        CryptoStream cryptoStream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Read);

        byte[] array2 = new byte[array.Length + 1];

        memoryStream.Close();

        cryptoStream.Close();

        string @string = Convert.ToBase64String(array2);

        var result = @string;

        return result;

    }

}