using System;

using System.Text.Json;

​

public class Program

{

    public static void Main()

    {

        var json = "{ \"id\": 126, \"person\": { \"name\": \"Mohammed\", \"profession\": \"Bomber\" }, \"hash\": \"qwq5321Sgh998134\" }";

        // Optional options

        var options = new JsonSerializerOptions

        {

            PropertyNameCaseInsensitive = true

        };

        // JSON to object

        var deserialized = JsonSerializer.Deserialize<Root>(json, options);

​

        Console.WriteLine(deserialized.Id);

        Console.WriteLine(deserialized.Person.Name);

        // Back to JSON

        var serializedJson = JsonSerializer.Serialize(deserialized);

        Console.WriteLine(serializedJson);

    }   

}

​

public class Root 

{

    public int Id { get; set; }

    public string Hash { get; set; }

    public Person Person { get; set; }

}

​

public class Person 

{

    public string Name { get; set; }

    public string Profession { get; set; }

}