using System;

using System.Security.Cryptography;

using System.Text;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var key = "webhook_secret_4ef442fbdb2ed66452097daf9e5ce8c3";

​

    using (var hmacsha256 = new HMACSHA256(Encoding.UTF8.GetBytes(key)))

    {

        var hash = hmacsha256.ComputeHash(Encoding.UTF8.GetBytes("2022-12-07T08:56:29.571Z" + "5b0006ce6e7bc852b76da61debcfdd19"));

        Console.WriteLine(ToHex(hash, false));

    }

    }

     private static string ToHex(byte[] bytes, bool upperCase)

    {

        StringBuilder result = new StringBuilder(bytes.Length * 2);

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

            result.Append(bytes[i].ToString(upperCase ? "X2" : "x2"));

        return result.ToString();

    }

}