using System;

using System.Text.Json;

public class Program

{

​

        public class Parent

        {

            public Child Child { get; private set; }

            public Parent(Child child)

            {

                Child = child;

            }

        }

​

        public class Child

        {

            public string Name { get; set; }

        }

    public static void Main()

    {

            var p = new Parent(new Child() { Name = "abc" });

​

            System.Text.Json.JsonSerializerOptions options = new()

            {

                ReferenceHandler = System.Text.Json.Serialization.ReferenceHandler.Preserve,

                WriteIndented = true

            };

​

            string parentJson = System.Text.Json.JsonSerializer.Serialize(p, options);

            Console.WriteLine($"Tyler serialized:\n{parentJson}");

​

            var tylerDeserialized =

                System.Text.Json.JsonSerializer.Deserialize<Parent>(parentJson, options);

    }

}