public class Total

    {

        public double First { get; set; }

        public double Second { get; set; }

    }

​

    public class MyClass

    {

        public Dictionary<double, Total> Dictionary { get; set; }

    }

​

    public class TotalConverter : JsonConverter

    {

        private readonly Func<Total, bool> _strategy;

​

        public TotalConverter(Func<Total, bool> strategy)

        {

            _strategy = strategy;

        }

​

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)

        {

            var result = _strategy((Total)value);

            JToken.FromObject(new { First = result, Second = !result }).WriteTo(writer);

        }

​

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

        {

            throw new NotImplementedException();

        }

​

        public override bool CanConvert(Type objectType)

        {

            return typeof(Total) == objectType;

        }

    }

​

    public class Program

    {

        public static void Main(string[] args)

        {

            var mc = new MyClass

            {

                Dictionary = new Dictionary<double, Total>

                {

                    [1] = new Total { First = 0.3, Second = 0.7 },

                    [2] = new Total { First = 0.4, Second = 0.6 },

                    [3] = new Total { First = 0.9, Second = 0.1 }

                }

            };

​

            var result = JsonConvert.SerializeObject(mc, new TotalConverter(total => total.First > total.Second));

        }

    }