using System;

using System.Collections.Generic;

using Newtonsoft.Json;

​

public class Header {

    public string action { get; set; }

}

​

public class Body {

    public string name { get; set; }

    public string content { get; set; }

}

​

public class Request

{

    public Header header { get; set; } = new Header();

    public Body body { get; set; } = new Body();

}

​

public class Program

{

    public static void Main()

    {

        var obj = new Request();

        obj.header.action = "UPDATE";

        obj.body.name = "Hobbit";

        obj.body.content = "asdfasdfsd";

        string str = JsonConvert.SerializeObject(obj);

        Console.WriteLine(str);

        // you transfer str to server

        var request = JsonConvert.DeserializeObject<Request>(str);

        Console.WriteLine(request.header.action);

    }

}

​

​