using System;

using System.Text;

using System.Security.Cryptography;

public class Program

{

    public static void Main()

    {

        string source = "e5aab3bb1ccce41465d7a0574cac48ce79070f64bbbd2868897c18d2c021ce29json{\"id\":\"francis-test@gmail.com\",\"lists\":{\"Morning Wire Subscribers\":1},\"vars\":{\"source\":\"KUB07\",\"first_name\":\"Francis\",\"last_name\":\"Test\"}}";

        using (MD5 md5Hash = MD5.Create())

        {

            string hash = GetMd5Hash(md5Hash, source);

            Console.WriteLine("The MD5 hash of " + source + " is: " + hash + ".");

            Console.WriteLine("Verifying the hash...");

            if (VerifyMd5Hash(md5Hash, source, hash))

            {

                Console.WriteLine("The hashes are the same.");

            }

            else

            {

                Console.WriteLine("The hashes are not same.");

            }

        }

    }

    static string GetMd5Hash(MD5 md5Hash, string input)

    {

        // Convert the input string to a byte array and compute the hash.

        byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(input));

        // Create a new Stringbuilder to collect the bytes

        // and create a string.

        StringBuilder sBuilder = new StringBuilder();

        // Loop through each byte of the hashed data 

        // and format each one as a hexadecimal string.

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

        {

            sBuilder.Append(data[i].ToString("x2"));

        }

        // Return the hexadecimal string.

        return sBuilder.ToString();

    }

    // Verify a hash against a string.

    static bool VerifyMd5Hash(MD5 md5Hash, string input, string hash)

    {

        // Hash the input.

        string hashOfInput = GetMd5Hash(md5Hash, input);

        // Create a StringComparer an compare the hashes.

        StringComparer comparer = StringComparer.OrdinalIgnoreCase;

        if (0 == comparer.Compare(hashOfInput, hash))

        {

            return true;

        }

        else

        {

            return false;

        }

    }

}