using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using System.Collections.Generic;

​

public class PropertyChange

    {

        public string Name { get; set; }

        public string From { get; set; }

        public string To { get; set; }

​

        public PropertyChange(string name, object from, object to)

        {

            Name = name;

            From = from!.ToString();

            To = to!.ToString();

        }

    }

​

public class Program

{

    public static void Main()

    {

        var diff = new Differ().GetDiff("{\"id\":1, \"name\":\"name v1\", \"roles\":[\"payment\", \"trade\"]}", "{\"id\":1, \"name\":\"name v2\", \"roles\":[\"payment\"]}");

        foreach (var x in diff)

            Console.WriteLine("{0} from {1} to {2}", x.Name, x.From, x.To);

    }

    public class Differ

    {

        public PropertyChange[] GetDiff(string json1, string json2)

        {

            var object1 = JObject.Parse(json1);

            var object2 = JObject.Parse(json2);

            return GetDiff(object1, object2).ToArray();

        }

​

        private List<PropertyChange> GetDiff(JObject source, JObject target)

        {

            List<PropertyChange> result = new List<PropertyChange>();

            foreach (KeyValuePair<string, JToken> sourcePair in source)

            {

                if (sourcePair.Value.Type == JTokenType.Object)

                {

                    if (target.GetValue(sourcePair.Key) == null)

                    {

                        result.Add(new PropertyChange(sourcePair.Key, sourcePair.Value, "NULL"));

                    }

                    else if (target.GetValue(sourcePair.Key).Type != JTokenType.Object)

                    {

                        result.Add(new PropertyChange(sourcePair.Key, sourcePair.Value, target.GetValue(sourcePair.Key)));

                    }

                    else

                    {

                        result.AddRange(GetDiff(sourcePair.Value.ToObject<JObject>(), target.GetValue(sourcePair.Key).ToObject<JObject>()));

                    }

                }

                else

                {

                    JToken sourceValue = sourcePair.Value;

                    var targetValue = target.GetValue(sourcePair.Key);

                    if (targetValue == null)

                    {

                        result.Add(new PropertyChange(sourcePair.Key, sourcePair.Value, "NULL"));

                    }

                    else if (sourceValue.ToString() != targetValue.ToString())

                    {

                        result.Add(new PropertyChange(sourcePair.Key, sourcePair.Value, targetValue));

                    }

                }

            }

            foreach (KeyValuePair<string, JToken> targetPair in target)

            {

                if (source.ContainsKey(targetPair.Key))

                    continue;

                result.Add(new PropertyChange(targetPair.Key, "NULL", targetPair.Value));

            }

            return result;

        }

    }

}