using System;

using System.Collections.Generic;

using Newtonsoft.Json;

​

​

public class File

{

    public string BlobId { set; get; }

    public string FileName { set; get; }

}

​

public class Folder

{

    public string FolderName { set; get;}

    public List<File> Files { set; get; }

    public List<Folder> Folders { set; get; }

}

​

public class Program

{

    public static void Main()

    {

        Folder subFolder = new Folder();

        subFolder.FolderName = "Documents";

        subFolder.Files = new List<File>();

        subFolder.Files.Add(new File() { BlobId = Guid.NewGuid().ToString(), FileName = "in sub1.txt" });

        subFolder.Files.Add(new File() { BlobId = Guid.NewGuid().ToString(), FileName = "in sub2.txt" });

        Folder root = new Folder();

        root.Files = new List<File>();

        root.Files.Add(new File() { BlobId = Guid.NewGuid().ToString(), FileName = "in root1.txt" });

        root.Files.Add(new File() { BlobId = Guid.NewGuid().ToString(), FileName = "in root2.txt" });

        root.Folders = new List<Folder>();

        root.Folders.Add(subFolder);

        Console.WriteLine(JsonConvert.SerializeObject(root, Formatting.Indented,

    new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore }));

    }

}