将Javascript HMAC转换为C#

const CryptoJS = require("crypto-js");

const message = "Hello, world!";
const key = "secret-key";

const hmac = CryptoJS.HmacSHA256(message, key);
const hmacBase64 = hmac.toString(CryptoJS.enc.Base64);

console.log(hmacBase64);

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

class Program
{
    static void Main()
    {
        string message = "Hello, world!";
        string key = "secret-key";

        byte[] keyBytes = Encoding.UTF8.GetBytes(key);
        byte[] messageBytes = Encoding.UTF8.GetBytes(message);

        using (HMACSHA256 hmac = new HMACSHA256(keyBytes))
        {
            byte[] hmacBytes = hmac.ComputeHash(messageBytes);
            string hmacBase64 = Convert.ToBase64String(hmacBytes);

            Console.WriteLine(hmacBase64);
        }
    }
}