using System;

using System.Text;

using System.Text.RegularExpressions;

using System.Security.Cryptography;

using Newtonsoft.Json.Linq;

​

public class Program

{

    public static void Main()

    {

        string accnum = "SAJ02";

        string accname = "Shaun Allen Joinery";

        string email = "shaunallenjoinery@gmail.com"; 

        string actcode = "K3SDHVI6B8LWMZLKDLJI2E4TZWM3PMRI"; 

        string userid = "800223";

        var md5 = MD5SumString(accnum + accname + email + actcode);

        Console.WriteLine(md5);

        //https://stackoverflow.com/questions/18246716/creating-json-on-the-fly-with-jobject

        dynamic jsonObject = new JObject();

        jsonObject.accname = accname;

        jsonObject.accnum = accnum;

        jsonObject.code1 = actcode;

        jsonObject.code2 = md5.ToLower();

        jsonObject.email = email;       

        // also include, but not in md5 summed section, so older exes can still acquire

        jsonObject.userid = userid;

        string myout = jsonObject.ToString(Newtonsoft.Json.Formatting.None);

        //myout = myout + "r"; // add Cg==

        Console.WriteLine(myout);   

        //encode the json string base64

        byte[] data = ASCIIEncoding.ASCII.GetBytes(myout);

        string base64Encoded = Convert.ToBase64String(data);

        string sourceString = base64Encoded + "Cg==";       

        var regex = new Regex(@".{0,76}", RegexOptions.Multiline);

        var words = regex.Replace(sourceString, "$0\r\n");

        var finalString = String.Join(",", words);

        Console.WriteLine(finalString);

    }

    public static string MD5SumString(string input) {

        // Step 1, calculate MD5 hash from input

        MD5 md5 = MD5.Create();

        byte[] inputBytes = Encoding.ASCII.GetBytes(input);

        byte[] hashBytes = md5.ComputeHash(inputBytes);

        // Step 2, convert byte array to hex string

        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < hashBytes.Length; i++) {

            sb.Append(hashBytes[i].ToString("X2"));

        }

        return sb.ToString();

    }

}