using System;

using Newtonsoft.Json;

​

#nullable enable

public class Program

{

    public static void Main()

    {

        var recClass = JsonConvert.DeserializeObject<RecClass>("{\"Age\":30}");

        Console.WriteLine("{0}: {1}", recClass.Employee?.Name, recClass.Age);

        var rec = JsonConvert.DeserializeObject<Rec>("{\"Age\":30}");

        Console.WriteLine("{0}: {1}", rec.Employee?.Name, rec.Age);

        var rec2 = JsonConvert.DeserializeObject<Rec>("{\"Age\":30, \"Employee\":{ \"Name\": \"kofifus\" }}");

        Console.WriteLine("{0}: {1}", rec2.Employee?.Name, rec2.Age);

    }

    //record Rec(int Age, Employee Employee); // Employee has a default constructor

    record Rec

    {

        public int Age { get;init; }

        public Employee Employee { get;init; } = new Employee();

    }

    public class RecClass

    {

        public int Age { get;set; }

        public Employee Employee { get;set; } = new Employee();

    }

    public class Employee

    {

        public string Name { get;set; } = "Default Employee";

        public Employee()

        {}

    }

}