using System;

using System.Text.Json;

using System.Collections.Generic;

#nullable enable

​

namespace SerializeExtra {

    public class WeatherForecast {

        public DateTimeOffset Date { get; set; }

        public int TemperatureCelsius { get; set; }

        public string? Summary { get; set; }

        public string? SummaryField;

        public IList<DateTimeOffset>? DatesAvailable { get; set; }

        public Dictionary<string, HighLowTemps>? TemperatureRanges { get; set; }

        public string[]? SummaryWords { get; set; }

    }

​

    public class HighLowTemps {

        public int High { get; set; }

        public int Low { get; set; }

    }

​

    public class Program {

        public static void Main() {

            var weatherForecast = new WeatherForecast {

                Date = DateTime.Parse("2019-08-01"),

                TemperatureCelsius = 25,

                Summary = "Hot",

                SummaryField = "Hot",

                DatesAvailable = new List<DateTimeOffset>() { DateTime.Parse("2019-08-01"), DateTime.Parse("2019-08-02") },

                TemperatureRanges = new Dictionary<string, HighLowTemps> {

                        ["Cold"] = new HighLowTemps { High = 20, Low = -10 },

                        ["Hot"] = new HighLowTemps { High = 60 , Low = 20 }

                    },

                SummaryWords = new[] { "Cool", "Windy", "Humid" }

            };

            var options = new JsonSerializerOptions { WriteIndented = true };

            string jsonString = JsonSerializer.Serialize(weatherForecast, options);

            Console.WriteLine(jsonString);

        }

    }

}