Classes- Mentor Group

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{ class Mentor
    {
        public string Name { get; set; }

    }

    class Program
    {
        public static object Culture { get; private set; }

        static void Main(string[] args)
        {
            var dates = new Dictionary<string, List<DateTime>>();
            var comments = new Dictionary<string, List<string>>();

            var input = Console.ReadLine();

            while (input != "end of dates")
            {
                var info = input.Split(new char[] { ' ', ',' }).ToList();
                string name = info[0];

                if (dates.ContainsKey(name)==false)
                {
                    dates.Add(name, new List <DateTime>());
                    comments.Add(name, new List <string>());
                }

                for (int i = 1; i < info.Count; i++)
                {
                    var currentDate = DateTime.ParseExact(info[i], "dd/MM/yyyy", CultureInfo.InvariantCulture);
                    dates[name].Add(currentDate);
                }
                input = Console.ReadLine();
            }

            var commentInfo = Console.ReadLine();

            while (commentInfo != "end of comments")
            {
                var inputComment = commentInfo.Split('-').ToList();
                string name = inputComment[0];

                if (comments.ContainsKey(name))
                {
                    comments[name].Add(inputComment[1]);
                }

                commentInfo = Console.ReadLine();
            }

            foreach (var item in comments.OrderBy(x=>x.Key))
            {
                Console.WriteLine($"{item.Key}\nComments:");
                foreach (var comment in item.Value)
                {
                    Console.WriteLine($"- {comment}");
                }
                Console.WriteLine($"Dates attended:");
                foreach (var date in dates[item.Key].OrderBy(x=>x.Date))
                {
                    Console.WriteLine($"-- {date:dd/MM/yyyy}");
                }
            }
        }
    }
}