using System;

using System.Collections.Generic;

using Newtonsoft.Json.Linq; 

public class Program

{

    public static void Main()

    {       

        string someJson =@"{

            ""FileLeafRef"": ""FILENAMEBOYS.jpg"",

            ""link"": {

                ""Description"": ""https://stackoverflow.com/questions/ask"",

                ""Url"": ""https://stackoverflow.com/questions/ask""

            }

        }";

        var jObject = JObject.Parse(someJson);

        var parentDict = jObject.ToObject<Dictionary<string, object>>();

        foreach (var parentPair in parentDict) 

        {

            Console.Write(string.Format("Key: {0}, ", parentPair.Key));

            if (parentPair.Value is JObject)

            {

                Console.WriteLine();

                var childDict = ((JObject)parentPair.Value).ToObject<Dictionary<string, string>>();

                foreach (var childPair in childDict) 

                {

                    Console.WriteLine(string.Format("\tKey: {0}, Value: {1}", childPair.Key, childPair.Value));

                }

            }

            else if (parentPair.Value is string)

            {

                Console.WriteLine(string.Format("Value: {0}", parentPair.Value));

            }

        }

    }

}