using System;

using System.Text.Json;

using System.Text.Json.Serialization;

​

public class WeatherForecast

{

    public DateTimeOffset Date { get; set; }

    public int TemperatureCelsius { get; set; }

    public string Summary { get; set; }

}

​

public class Program

{

    public static void Main()

    {

        WeatherForecast weatherForecast = new WeatherForecast();

        weatherForecast.Date = DateTime.Today;

        weatherForecast.TemperatureCelsius = 24;

        weatherForecast.Summary = "This is it !!!";

        string jsonString = JsonSerializer.Serialize(weatherForecast);

        Console.WriteLine(jsonString);

    }

}