using Newtonsoft.Json;

​

public class Name

{

    public string type { get; set; }

}

​

public class Items

{   

    public string type { get; set; }

}

​

public class Hobbies

{

    public string type { get; set; }

    public Items items { get; set; }

}

​

public class Properties

{   

    public Name name { get; set; }

    public Hobbies hobbies { get; set; }

}

​

public class Example

{

    public string description { get; set; }

    public string type { get; set; }

    public Properties properties { get; set; }

}

public class Program

{

    public static void Main()

    {

        Example model = new Example();

        model.properties = new Properties();

        model.properties.name = new Name();

        model.properties.hobbies = new Hobbies();

        model.properties.hobbies.items = new Items();

        model.properties.name.type = "cc";

        var data = JsonConvert.SerializeObject(model);

        System.Console.WriteLine(data);

    }

}