using System;

using System.Text;

using System.Linq;

​

public class Program

{

    private static string GetNotificationId(string emailAddress, int key, string identity)

    {

        var plainText = emailAddress + key.ToString() + identity;

        Console.WriteLine(plainText);

        var sb = new StringBuilder(128);

        using (var sha512 = System.Security.Cryptography.SHA512.Create())

        {

            var data = sha512.ComputeHash(Encoding.UTF8.GetBytes(plainText));

            var sb2 = BitConverter.ToString(data).Replace("-", String.Empty);

            Console.WriteLine(sb2);

            foreach (var b in data)

            {

                sb.Append(b.ToString("X2"));

            }

​

            return sb.ToString();

        }

    }

​

    public static void Main()

    {

        var hash = GetNotificationId("dcooper@tyndaleusa.com", 466001, "Managed_Forgot_Password");

        Console.WriteLine(hash);

    }

}