Mentor Group Refactored

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

namespace DefiningClasses
{
    public class StartUp
    {
        public static void Main(string[] args)
        {
            var dictOfStudents = new SortedDictionary<string, Student>();

            var inputNameAndDate = Console.ReadLine();
            while (inputNameAndDate != "end of dates")
            {
                var inputTokens = inputNameAndDate
                    .Split(' ', ',')
                    .ToList();
                var userName = inputTokens[0];
                if (!dictOfStudents.ContainsKey(userName))
                {
                    dictOfStudents.Add(userName, new Student());
                    dictOfStudents[userName].StudentName = userName;
                    dictOfStudents[userName].AttendingDates = new List<DateTime>();
                }
                //var currentStudent = new Student();
                //currentStudent.StudentName = userName;
                //currentStudent.AttendingDates = new List<DateTime>();

                int numberOfDates = inputTokens.Count();
                for (int index = 1; index < numberOfDates; index++)
                {
                    dictOfStudents[userName].AttendingDates.Add(DateTime.ParseExact(inputTokens[index], "dd/MM/yyyy", CultureInfo.InvariantCulture));
                }

                //dictOfStudents[userName] = currentStudent;

                inputNameAndDate = Console.ReadLine();
            }

            // comment section
            string comment = Console.ReadLine();
            while (comment != "end of comments")
            {
                var commentTokens = comment.Split('-').ToArray();
                string userName = commentTokens[0];

                bool dictContainsUserName = dictOfStudents.ContainsKey(userName);
                if (dictContainsUserName == false)
                {
                    comment = Console.ReadLine();
                    continue;
                }
                else // it does exist
                {
                    var currentStudent = dictOfStudents[userName];

                    bool alreadyHaveComments = currentStudent.Comment != null;
                    if (alreadyHaveComments == true)
                    {
                        currentStudent.Comment.Add(commentTokens[1]);
                    }
                    else
                    {
                        currentStudent.Comment = new List<string>();
                        currentStudent.Comment.Add(commentTokens[1]);
                    }
                }

                comment = Console.ReadLine();
            }

            // sorting Dates and printing
            foreach (var student in dictOfStudents.Keys)
            {
                var currentStudent = dictOfStudents[student];

                Console.WriteLine(currentStudent.StudentName);
                Console.WriteLine("Comments:");
                if (currentStudent.Comment != null)
                {
                    foreach (var currentComment in currentStudent.Comment)
                    {
                        Console.WriteLine($"- {currentComment}");
                    }
                }

                Console.WriteLine("Dates attended:");
                foreach (var date in currentStudent.AttendingDates.OrderBy(x => x))
                {
                    Console.WriteLine($"-- {date:dd/MM/yyyy}");
                }
            }
        }
    }

    public class Student
    {
        public string StudentName
        {
            get; set;
        }

        public List<DateTime> AttendingDates
        {
            get; set;
        }

        public List<string> Comment
        {
            get; set;
        }
    }
}