using System;

using System.Text.Json;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var bytes = new byte[] { 220, 230, 240, 22, 23, 24, 26 };

        var json = JsonSerializer.Serialize(bytes.Select(b => (int)b));

        Console.WriteLine(json);

    }

}