using System;

using System.Text.RegularExpressions;

using System.Text.Json;

​

​

public class Person

{

    public string Name { get; set; }

    public TimeSpan Duration { get; set; }

}

​

​

public class Program

{

​

    public static void Main()

    {

        // Create an object

        var person = new Person { Name = "Alice", Duration = TimeSpan.FromMinutes(45) };

​

        // Serialize to JSON

        string json = JsonSerializer.Serialize(person);

        Console.WriteLine("Serialized JSON: " + json);

​

        // Deserialize back to object

        var deserializedPerson = JsonSerializer.Deserialize<Person>(json);

        Console.WriteLine("Deserialized duration: " + deserializedPerson.Duration);

    }

}