CleanCode Erettsegi LOL

using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Text.RegularExpressions;

namespace Erettsegi1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<Record> records = new List<Record>();

            // 1. Read file contents
            foreach (string line in File.ReadAllLines("jarmu.txt"))
                records.Add(new Record(line.Split(' ')));

            // 2. Worktime
            Console.WriteLine("2. feladat:\n{0}", records[records.Count - 1].Hour - records[0].Hour);

            // 3. First occ. by hours
            Console.WriteLine("\n3. feladat:");
            int currentHour = records[0].Hour;
            foreach (KeyValuePair<int, Record> kp in records.Where(i => { if (i.Hour == currentHour) { currentHour++; return true; } return false; }).ToDictionary(i => i.Hour))
                Console.WriteLine("{0} óra: {1}", kp.Key.ToString(), kp.Value.PlateNumber);

            // 4. Categories
            Console.WriteLine("\n4. feladat:");
            Console.WriteLine("Autóbusz: {0}", records.Where(i => i.PlateNumber.ToCharArray()[0] == 'B').Count());
            Console.WriteLine("Kamion: {0}", records.Where(i => i.PlateNumber.ToCharArray()[0] == 'K').Count());
            Console.WriteLine("Motor: {0}", records.Where(i => i.PlateNumber.ToCharArray()[0] == 'M').Count());

            // 5. Longest quiet period
            Console.WriteLine("\n5. feladat:");
            Console.WriteLine(getLongestQuietPeriod(records));

            // 6. Search
            Console.WriteLine("\n6. feladat:");
            string search = Console.ReadLine();
            foreach (Record r in records.Where(getMatchingCars(search)))
                Console.WriteLine(r.PlateNumber);

            // 7. Get observed cars
            Console.WriteLine("\n7. feladat:");
            File.WriteAllLines("vizsgalt.txt", getRecordListData(getObservedCars(records)));

            Console.ReadLine();
        }

        static string getLongestQuietPeriod(List<Record> records)
        {
            long maxdiff = 0;
            DateTime minTime = DateTime.MinValue, maxTime = DateTime.MinValue;
            for (int i = 1; i < records.Count; i++)
            {
                var diff = records[i].GetTime().Ticks - records[i - 1].GetTime().Ticks;

                if (diff > maxdiff)
                {
                    minTime = records[i - 1].GetTime();
                    maxTime = records[i].GetTime();
                    maxdiff = diff;
                }
            }

            return String.Format("{0} - {1}", minTime.ToString("HH:mm:ss"), maxTime.ToString("HH:mm:ss"));
        }

        static Func<Record, Boolean> getMatchingCars(string query)
        {
            return new Func<Record, bool>(i => {
                return new Regex(Regex.Escape(query).Replace(@"\*", ".*")).IsMatch(i.PlateNumber);
            });
        }

        static List<Record> getObservedCars(List<Record> records)
        {
            List<Record> results = new List<Record>();
            results.Add(records[0]);

            long lastObservedTime = records[0].GetTime().Ticks;
            long fiveMins = DateTime.MinValue.AddMinutes(5).Ticks;
            for(int i = 1; i < records.Count; i++)
            {
                if (records[i].GetTime().Ticks - lastObservedTime >= fiveMins)
                {
                    results.Add(records[i]);
                    lastObservedTime = records[i].GetTime().Ticks;
                }
            }

            return results;
        }

        static List<String> getRecordListData(List<Record> records)
        {
            List<String> results = new List<string>();
            foreach (Record r in records)
                results.Add(String.Format("{0} {1}", r.GetTime().ToString("HH mm ss"), r.PlateNumber));
            return results;
        }
    }

    public class Record
    {
        public int Hour;
        public int Min;
        public int Sec;
        public string PlateNumber;

        public Record(string[] data)
        {
            Hour = int.Parse(data[0]);
            Min = int.Parse(data[1]);
            Sec = int.Parse(data[2]);
            PlateNumber = data[3];
        }

        public DateTime GetTime()
        {
            return new DateTime(1970, 1, 1, Hour, Min, Sec);
        }
    }
}