using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using JsonFlatten;

public class Program

{

    public static void Main()

    {

        string jsonString = @"{

             ""name"": ""John"",

             ""address"":{

                  ""city"": ""Lisbon"",

                  ""street"": ""Central street""

             }

        }";

        var jObject = JObject.Parse(jsonString);

        var origJobject = JsonConvert.SerializeObject(jObject);

        var flattened = jObject.Flatten();

        var flattenedString = JsonConvert.SerializeObject(flattened, Formatting.Indented);

        Console.WriteLine(origJobject);

        Console.WriteLine();

        Console.WriteLine("************************************");

        Console.WriteLine();

        Console.WriteLine(flattenedString);

    }

}