using System;

using System.IdentityModel.Tokens.Jwt;

using System.Linq;

using System.Security.Claims;

using System.Text;

using System.Threading.Tasks;

using Microsoft.IdentityModel.Tokens;

using System.Security.Cryptography;

public class Program

{

    public static void Main()

    {

        // Generate HMACSHA256 Secret key

        var hmac = new HMACSHA256();

        var key = Convert.ToBase64String(hmac.Key);

        Console.WriteLine(key);

    }

}