using System;

using System.Collections.Generic;

using System.Linq;

using System.IO;

using System.Security.Cryptography;

using System.Text;

​

​

public class Program

{

    public static void Main()

    {

        var list = new List<int>() { 1, 2, 3, 4, 5 };

        Console.WriteLine(Json.JsonSerializer.Serialize(list));

    }

}