03. Articles 2.0

using System;
using System.Collections.Generic;
using System.Linq;

namespace Articles2
{
    class Program
    {
        public static void Main()
        {
            List<Article> articles = new List<Article>();
            int num = int.Parse(Console.ReadLine());

            for (int i = 0; i < num; i++)
            {
                string[] info = Console.ReadLine().Split(", ", StringSplitOptions.RemoveEmptyEntries).ToArray();
                Article article = new Article(info[0], info[1], info[2]);
                articles.Add(article);
            }

            string str = Console.ReadLine();
            articles.OrderByDescending(x => str == "title" ? x.Title : str == "content" ? x.Content : x.Author).ToList();

            Console.WriteLine(String.Join("\n", articles));
        }

        public class Article
        {
            public Article(string title, string content, string author)
            {
                Title = title;
                Content = content;
                Author = author;
            }

            public string Title { get; set; }

            public string Content { get; set; }

            public string Author { get; set; }

            public override string ToString()
            {
                return $"{Title} - {Content}: {Author}";
            }
        }
    }
}