using System;

using Newtonsoft.Json;

​

public static class Ext

{

    public static string NormalizeJson(this string input) {

       return JsonConvert.SerializeObject(JsonConvert.DeserializeObject<object>(input));

    }

}

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("{ x: 5, y: 6 }".NormalizeJson());

    }

}