using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

​

​

public class Program

{

    public static void Main()

    {

        Console.Write(@"{ ""Test1"": "+ "\n ");

        Console.WriteLine(ModifyJSON(googleSearchText, "$.responseData.cursor.pages[?(@.label>=3)]", "{ 'start': '00', 'label': -1 }", Formatting.Indented));

        Console.Write(@"},{ ""Test2"": "+ "\n ");

        Console.WriteLine(ModifyJSON(googleSearchText, "$.responseData.results[*]", "{ 'url': '~~ url masked ~~', 'visits': 6, 'visible': true, 'pages': null }", Formatting.Indented));

        Console.WriteLine(@"}");

    }

    // Note that any of the elment within the jstr has to be exist within the jpath, 

    // Otherwise, exception will be thrown

    public static string ModifyJSON(string jsource, string jpath, string jstr, Formatting jf = Formatting.None)

    {

        JObject jobj = JObject.Parse(jsource);

        JObject update = JObject.Parse(jstr);

        foreach (var token in jobj.SelectTokens(jpath))

        {

            foreach (var x in update)

            {

                string name = x.Key;

                JToken value = x.Value;

                token.SelectToken(name).Replace(value);

            }

        }

        return JsonConvert.SerializeObject(jobj, jf);

    }

​

​

    static string googleSearchText = @"{

  'responseData': {

    'results': [

      {

        'GsearchResultClass': 'GwebSearch',

        'unescapedUrl': 'http://en.wikipedia.org/wiki/Paris_Hilton',

        'url': 'http://en.wikipedia.org/wiki/Paris_Hilton',

        'visibleUrl': 'en.wikipedia.org',

        'cacheUrl': 'http://www.google.com/search?q=cache:TwrPfhd22hYJ:en.wikipedia.org',

        'title': '<b>Paris Hilton</b> - Wikipedia, the free encyclopedia',

        'titleNoFormatting': 'Paris Hilton - Wikipedia, the free encyclopedia',

        'visits': 0, 'visible': false, 

        'pages': {

          'start': '0',

          'label': 1

        },

       'content': '[1] In 2006, she released her debut album...'

      },

      {

        'GsearchResultClass': 'GwebSearch',

        'unescapedUrl': 'http://www.imdb.com/name/nm0385296/',

        'url': 'http://www.imdb.com/name/nm0385296/',

        'visibleUrl': 'www.imdb.com',

        'cacheUrl': 'http://www.google.com/search?q=cache:1i34KkqnsooJ:www.imdb.com',

        'title': '<b>Paris Hilton</b>',

        'titleNoFormatting': 'Paris Hilton',

        'visits': 0, 'visible': false, 

        'pages': {

          'start': '0',

          'label': 1

        },

        'content': 'Self: Zoolander. Socialite <b>Paris Hilton</b>...'

      }

    ],

    'cursor': {

      'pages': [

        {

          'start': '0',

          'label': 1

        },

        {

          'start': '4',

          'label': 2

        },

        {

          'start': '8',

          'label': 3

        },

        {

          'start': '12',

          'label': 4

        }

      ],

      'estimatedResultCount': '59600000',

      'currentPageIndex': 0,

      'moreResultsUrl': 'http://www.google.com/search?oe=utf8&ie=utf8...'

    }

  },

  'responseDetails': null,

  'responseStatus': 200

}

";

}

​