Get HMAC SHA256 for Shyplite

sha.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;

namespace ConsoleApp1
{
    class Auth
    {

        public String GetHash(String text, String key)
        {
            ASCIIEncoding encoding = new ASCIIEncoding();
            Byte[] textBytes = encoding.GetBytes(text);
            Byte[] keyBytes = encoding.GetBytes(key);

            Byte[] hashBytes;

            using (HMACSHA256 hash = new HMACSHA256(keyBytes))
                hashBytes = hash.ComputeHash(textBytes);
            String.Concat(Array.ConvertAll(hashBytes, x => x.ToString("x2")));

            // to base64
            return (Uri.EscapeDataString(Convert.ToBase64String(hashBytes)));
        }


        static void Main(string[] args)
        {
            DateTime foo = DateTime.UtcNow;
            long unixTime = ((DateTimeOffset)foo).ToUnixTimeSeconds();
            string appId = "1129";
            string key = "NIZePNJ4BBc=";
            string secret = "1hezif2aqq+mTxVe1LFNJbW4nWQ13YF9x/jEEKmHBVFRiiWzQTHXtsXS02B/TABs0kEEIsjb8CBdTbraXMGyPA==";
            string hash = "key:5nF6Ai4ykPY=id:1:timestamp:1500000000000";
            Auth token = new Auth();
            string result = token.GetHash(hash, secret);
            Console.WriteLine(result);
            Console.ReadKey();
        }
    }
}