using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        string single = System.Text.Json.JsonSerializer.Serialize(new { a = 1});

        string multiple = System.Text.Json.JsonSerializer.Serialize(new List<object>(){new { a = 1}, new {a = 2}});

        Console.WriteLine(single);

        Console.WriteLine(multiple);

        object objSingle = System.Text.Json.JsonSerializer.Deserialize<object>(single);

        Console.WriteLine("single object : " + objSingle);

        object objMultiple = System.Text.Json.JsonSerializer.Deserialize<object>(multiple);

        Console.WriteLine("multiple object : " + objMultiple);

        Console.WriteLine("multiple object type : " + objMultiple.GetType()); //JsonElement

        System.Text.Json.JsonElement jElSingle = System.Text.Json.JsonSerializer.Deserialize<System.Text.Json.JsonElement>(single);

        System.Text.Json.JsonElement jElMultiple = System.Text.Json.JsonSerializer.Deserialize<System.Text.Json.JsonElement>(multiple);

        Console.WriteLine("single kind : " + jElSingle.ValueKind);

        Console.WriteLine("multiple kind : " + jElMultiple.ValueKind);

        Console.WriteLine("multiple array count : " + jElMultiple.GetArrayLength());

        if(System.Text.Json.JsonValueKind.Array == jElSingle.ValueKind)

            Console.WriteLine("single is array");

        else if(System.Text.Json.JsonValueKind.Object == jElSingle.ValueKind)

            Console.WriteLine("single is object");

        if(System.Text.Json.JsonValueKind.Array == jElMultiple.ValueKind)

            Console.WriteLine("multiple is array");

        else if(System.Text.Json.JsonValueKind.Object == jElMultiple.ValueKind)

            Console.WriteLine("multiple is object");

    }

}