โค๊ดนี้ เป็นภาษาอะไร ใช้โปรแกรมไรเขียน แล้วเขียนให้แสดงผล ยังไงหรอครับ

using System;
using System.Security.Cryptography;
using System.Text;

namespace exp
{
    class Program
    {
        static void Main(string[] args)
        {
            var createdSign = CreateSign("1618683366", "name", "key");
            Console.WriteLine(createdSign);
        }

        public static string CreateSign(string timeStamp, string partnername, string key)
        {
            var word = partnername.ToLower() + timeStamp + key.ToLower();
            using (var crypt = new SHA256Managed())
            {
                var hash = new StringBuilder();
                var crypto = crypt.ComputeHash(Encoding.UTF8.GetBytes(word), 0,
                    Encoding.UTF8.GetByteCount(word));
                foreach (var theByte in crypto)
                {
                    hash.Append(theByte.ToString("x2"));
                }
                return hash.ToString();
            }
        }

    }
}

<?php


$csharpResult = '7608a2ca1195c652168f89daa7bc3e18bfbd7c84ae00ebf33880609b3fc997c5';
$phpResult = createSign('1618683366', 'name', 'key');


var_dump($phpResult);
echo 'csharp === php result:';
var_dump($csharpResult === $phpResult);
assert($csharpResult === $phpResult);// ถ้าไม่ผ่านจะ error (PHP 7+)


function createSign($timestamp, $partnername, $key)
{
    $word = strtolower($partnername) . $timestamp . strtolower($key);
    
    return hash('sha256', $word);
}