using System;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        var json = @"{'name':'doug','things_done':['do','not','remove','these','ComplyAdvantage'],'diligence':{'watchlists':{'matches':['a','b','c']}},'raw_responses':{'a':'b','ComplyAdvantage':'bye bye'},'formatted_responses':{'ComplyAdvantage':'bye','a':'b'},'supplied':{'a':'b'}, 'test':{'supplied':'this is wanted','ComplyAdvantage':'this is not?','matches':['should','exist'],'noneOfTheAbove':'w00t'}}";

        Console.WriteLine(json);

        Console.WriteLine("");

        var filteredJson = FilterRawData(json);

        Console.WriteLine(filteredJson);

        Console.WriteLine("");

        var moreFilteredJson = FilterRawDataV2(json);

        Console.WriteLine(moreFilteredJson);

    }

    private static string FilterRawData(string rawData)

    {

        var jsonObj = JObject.Parse(rawData);

​

        jsonObj.SelectToken("supplied")?.Parent.Remove();

        jsonObj.SelectToken("diligence.watchlists.matches")?.Parent.Remove();

        jsonObj.SelectToken("raw_responses.ComplyAdvantage")?.Parent.Remove();

        jsonObj.SelectToken("formatted_responses.ComplyAdvantage")?.Parent.Remove();

        return jsonObj.ToString(Formatting.None);

    }

    private static string FilterRawDataV2(string rawData)

    {

        var jsonObj = JObject.Parse(rawData);

​

        RemoveFields(jsonObj, new[] { "supplied", "matches", "ComplyAdvantage" });

        return jsonObj.ToString(Formatting.None);

    }

    public static JToken RemoveFields(JToken token, string[] fields)

    {

        JContainer container = token as JContainer;

        if (container == null) return token;

        List<JToken> removeList = new List<JToken>();

        foreach (JToken el in container.Children())

        {

            JProperty p = el as JProperty;

            if (p != null && fields.Contains(p.Name))

            {

                removeList.Add(el);

            }

            RemoveFields(el, fields);

        }

        foreach (JToken el in removeList)

        {

            el.Remove();

        }

        return token;

    }

}