using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("--- Version 1 ---");

        string json = @"

            {

              ""lat"": 44.47,

              ""lon"": 11.43,

              ""timezone"": ""Europe/Rome"",

              ""temperature"": 4.14

            }";

​

        var forecast = JsonConvert.DeserializeObject<Forecast>(json);

        DumpForecast(forecast);

​

        Console.WriteLine("\n--- Version 2 ---");

        json = @"

            {

              ""lat"": 44.47,

              ""lon"": 11.43,

              ""timezone"": ""Europe/Rome"",

              ""temperature"": {

                ""min"": 1.1,

                ""max"": 12.3

              }

            }";

​

        forecast = JsonConvert.DeserializeObject<Forecast>(json);

        DumpForecast(forecast);

    }

    static void DumpForecast(Forecast forecast)

    {

        Console.WriteLine("Latitude: " + forecast.Latitude);

        Console.WriteLine("Longitude: " + forecast.Longitude);

        Console.WriteLine("Time Zone: " + forecast.TimeZone);

        Console.WriteLine("Min Temp: " + forecast.Temperature.Min);

        Console.WriteLine("Max Temp: " + forecast.Temperature.Max);

        Console.WriteLine("Avg Temp: " + forecast.Temperature.Avg);

    }

}

​

public class Coordinates

{

    public double Latitude { get; set; }

    public double Longitude { get; set; }

}

​

public class Temperature

{

    public double? Avg { get; set; }

    public double? Min { get; set; }

    public double? Max { get; set; }

}

​

public class Forecast

{

    private Coordinates _coord = new Coordinates();

​

    [JsonProperty("lat")]

    public double Latitude

    {

        get => _coord.Latitude;

        set => _coord.Latitude = value;

    }

​

    [JsonProperty("lon")]

    public double Longitude

    {

        get => _coord.Longitude;

        set => _coord.Longitude = value;

    }

​

    [JsonProperty("timezone")]

    public string TimeZone { get; set; }

​

    [JsonProperty("temperature"), JsonConverter(typeof(MyTemperatureConverter))]

    public Temperature Temperature { get; set; } = new Temperature();

}

​

public class MyTemperatureConverter : JsonConverter

{

    public override bool CanConvert(Type objectType)

    {

        return objectType == typeof(Temperature);

    }

​

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

    {

        Temperature temp = new Temperature();

        JToken token = JToken.Load(reader);

        if (token.Type == JTokenType.Object)

        {

            temp.Min = (double?)token["min"];

            temp.Max = (double?)token["max"];

        }

        else

        {

            temp.Avg = (double?)token;

        }

        return temp;

    }

​

    public override bool CanWrite => false;

​

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

    {

        throw new NotImplementedException();

    }

}

​