using System;

using System.Runtime.Serialization;

using Newtonsoft.Json;

​

var person = new PersonTable() { PersonJson = "{\"FirstName\":\"John\",\"LastName\":\"Doe\"}" };

​

Console.WriteLine($"FirstName: {person.Person.FirstName}");

var serialized = JsonConvert.SerializeObject(person);

Console.WriteLine($"Serialized: {serialized} // Missing the Person property :(");

​

public class Person {

    public string FirstName { get; set; }

    public string LastName { get; set; }

}

​

public class PersonTable {

​

    [JsonIgnore]

    public string PersonJson { get; set; }

​

    private Person _person;

    [IgnoreDataMember]

    public Person Person {

        get { 

            if (_person == null)

            {

                 _person = JsonConvert.DeserializeObject<Person>(PersonJson);

            }

            return _person;

        }

        set { 

            _person = value;

            PersonJson = JsonConvert.SerializeObject(_person);

        }

    }

}