using System;

using System.Collections.Generic;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

​

public class Program

{

    public static void Main()

    {

        var list = new List<string>{"haha", "lol"};

        Test1(list);

        Test2(new List<object> {list});

    }

    public static void Test1<T>(List<T> arg)

    {

        JArray array = JArray.Parse(JsonConvert.SerializeObject(arg));

        Console.WriteLine($"Test1:  a = {JsonConvert.SerializeObject(arg)}, b = {array}");

    }

    public static void Test2(List<object> arg)

    {

        JArray array = JArray.Parse(JsonConvert.SerializeObject(arg));

        Console.WriteLine($"Test2:  a = {JsonConvert.SerializeObject(arg)}, b = {array}");

    }

}