using System;

using Newtonsoft.Json;

using System.ComponentModel.DataAnnotations;

using System.ComponentModel;

using System.Reflection;

​

public class Program

{

    public static void Main()

    {

        var stud = new Student("this is secret")

        {

            FirstName = "John",

            LastName = "Doe",

            Age = 25

        };

​

        Console.WriteLine(TypeDescriptor.GetAttributes(typeof(Student))[0]);

​

        foreach (PropertyDescriptor descriptor in

                 TypeDescriptor.GetProperties(typeof(Student)))

        {

            Console.WriteLine("*******************************");

            Console.WriteLine($"Property Name: {descriptor.Name}");

            foreach (Attribute attribute in descriptor.Attributes)

            {

                Console.WriteLine($"Attribute Name: {attribute}");

            }

        }

​

        var result = JsonConvert.SerializeObject(stud);

        Console.Write(result);

​

        var restoredStudent = JsonConvert.DeserializeObject(result, typeof(Student)) as Student;

        Console.WriteLine(restoredStudent.WhatIsTheSecret());

    }

}

​

[MetadataType(typeof(StudentSerializationConfig))]

public class Student

{

    public string FirstName { get; set; }

    public string LastName { get; set; }

    public int Age { get; set; }

    private readonly string _secret;

​

    public Student(string secret)

    {

        _secret = secret;

    }

​

    public string WhatIsTheSecret()

    {

        return _secret;

    }

}

​

public class StudentSerializationConfig

{

    [JsonProperty(PropertyName = "Secret")]

    private readonly string _secret;

​

    [JsonProperty(PropertyName = "StudentFirstName")]

    public string FirstName { get; set; }

​

    [JsonProperty(PropertyName = "StudentLastName")]

    public string LastName { get; set; }

​

    [System.Text.Json.Serialization.JsonIgnore]

    public int Age { get; set; }

}