using System;

using System.Security.Cryptography;

using System.Globalization;

public class Program

{

    static string APPLICATION_NAME = "AYTEMIZ";

    static string APPLICATION_PASSWORD = "aytemizpass";

    static string SECURE_CODE = "MqsHnb5d3KhFh9CS";

    static CultureInfo CultureInfoUpper = new CultureInfo("en-US");

    public static void Main()

    {

        string transactionId = new Random().Next(0, 1000000).ToString("D20");

        string transactionDateTime = DateTime.Now.ToString("yyyyMMddHHmmss") + "000";

        string securityData = APPLICATION_PASSWORD.ToUpper(CultureInfoUpper) + APPLICATION_NAME.ToUpper(CultureInfoUpper);

​

        securityData = Sha256(securityData).ToUpper();

​

        string hashData = APPLICATION_NAME.ToUpper(CultureInfoUpper) + transactionId.ToUpper(CultureInfoUpper) + transactionDateTime.ToUpper(CultureInfoUpper) + 

            SECURE_CODE.ToUpper(CultureInfoUpper) + securityData;

        hashData = Sha256(hashData);

        Console.WriteLine(transactionId);

        Console.WriteLine(transactionDateTime);

        Console.WriteLine(hashData);

    }

     static string Sha256(string originalString)

        {

            try

            {

                SHA256 mySHA256 = SHA256.Create();

                return Convert.ToBase64String(mySHA256.ComputeHash(System.Text.Encoding.UTF8.GetBytes(originalString)));

​

            }

            catch (Exception)

            {

                return null;

            }

        }

}