Simple Diary to Json

DemoDiary.cs

using System;
using System.Collections.Generic;
using System.IO;
using DemoDiary;
using Newtonsoft.Json;

namespace DemoDiary
{
    public class Diary
    {
        public List<Entry> Entries { get; set; } = new List<Entry>();

        public void Add(string v)
        {
            Entries.Add(new Entry(){Text = v, Time = DateTimeOffset.Now});
        }
    }

    public class Entry
    {
        public DateTimeOffset Time { get; set; }
        public string Text { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var diary = new Diary();

            var quit = false;
            while (!quit)
            {
                var entry = Console.ReadLine();
                if (entry?.ToLower() == "bye")
                {
                    quit = true;
                }
                else
                {
                    diary.Add(entry);
                }
            }
            File.WriteAllText("mydiary.json", JsonConvert.SerializeObject(diary));
            
        }
    }
}