Поиск пре

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

namespace linqFindCriminal
{
    class Program
    {
        static void Main(string[] args)
        {
            const int CommandNewFind = 1;
            const int CommandFindByNationality = 2;
            const int CommandFindByWeight = 3;
            const int CommandFindByHeight = 4;
            const int CommandExit = 5;
            bool isRunning = true;
            Database database = new Database();

            Console.WriteLine($"{ CommandNewFind} - Новый поиск");
            Console.WriteLine($"{ CommandFindByNationality} - Искать по национальности");
            Console.WriteLine($"{ CommandFindByWeight} - Искать по весу");
            Console.WriteLine($"{ CommandFindByHeight} - Искать по росту");
            Console.WriteLine($"{ CommandExit} - Закрыть программу");

            while (isRunning)
            {
                Console.Write("\nВведите команду: ");
                int userInput = UserUtils.GetNumberFromUser();

                switch (userInput)
                {
                    case CommandNewFind:
                        database.ResetFindResult();
                        break;

                    case CommandFindByNationality:
                        database.FindByNationality();
                        break;

                    case CommandFindByWeight:
                        database.FindByWeight();
                        break;

                    case CommandFindByHeight:
                        database.FindByHeight();
                        break;

                    case CommandExit:
                        isRunning = false;
                        break;
                }
            }
        }
    }

    class UserUtils
    {
        public static int GetNumberFromUser()
        {
            string userInput;
            int userNumber;
            bool isNumber = false;

            do
            {
                userInput = Console.ReadLine();
                isNumber = int.TryParse(userInput, out userNumber);
            }
            while (isNumber == false);

            return userNumber;
        }
    }

    class Criminal
    {
        public Criminal(string surname, string name, string patronymic, bool guarded, int height, int weight, string nationality)
        {
            Name = name;
            Surname = surname;
            Patronymic = patronymic;
            Guarded = guarded;
            Height = height;
            Weight = weight;
            Nationality = nationality;
        }

        public string Name { get; private set; }
        public string Surname { get; private set; }
        public string Patronymic { get; private set; }
        public bool Guarded { get; private set; }
        public int Height { get; private set; }
        public int Weight { get; private set; }
        public string Nationality { get; private set; }

        public void ShowInfo()
        {
            string guardedLabel = Guarded ? "да" : "нет";
            Console.WriteLine($"рост:{Height} вес:{Weight} национальность:{Nationality}  {Name} {Surname} {Patronymic}  Задержан:{guardedLabel}");
        }
    }

    class Database
    {
        private List<Criminal> _criminals = new List<Criminal>();
        private List<Criminal> _foundCriminals;

        public Database()
        {
            _criminals.Add(new Criminal("Иванов", "Иван", "Иванович", false, 160, 80, "Марсианин"));
            _criminals.Add(new Criminal("Петров", "Пётр", "Петрович", false, 163, 80, "Лунатик"));
            _criminals.Add(new Criminal("Сидоров", "Сидор", "Сидорович", true, 160, 70, "Марсианин"));
            _criminals.Add(new Criminal("Антонов", "Антон", "Антонович", false, 160, 80, "Лунатик"));
            _criminals.Add(new Criminal("Джигурда", "Валентин", "Исакевич", false, 163, 70, "Лунатик"));
            _criminals.Add(new Criminal("Кожедубов", "Артём", "Игоревич", false, 163, 80, "Землянин"));
            _criminals.Add(new Criminal("Натулько", "Алексей", "Петрович", false, 168, 70, "Марсианин"));
            _criminals.Add(new Criminal("Карбонный", "Антон", "Петрович", true, 163, 80, "Марсианин"));
            _criminals.Add(new Criminal("Филь", "Артём", "Александрович", false, 168, 99, "Землянин"));
            _criminals.Add(new Criminal("Попов", "Пётр", "Сидорович", false, 160, 99, "Марсианин"));
            _criminals.Add(new Criminal("Ларетти", "Антон", "Александрович", true, 163, 99, "Землянин"));
            _criminals.Add(new Criminal("Ковальски", "Иван", "Моисеевич", false, 168, 80, "Землянин"));
            ResetFindResult();
        }

        public void ResetFindResult()
        {
            _foundCriminals = _criminals;
        }

        public void FindByHeight()
        {
            Console.WriteLine("Введите рост");
            int height = UserUtils.GetNumberFromUser();
            _foundCriminals = _foundCriminals.Where(criminal => criminal.Height == height && criminal.Guarded == false).ToList<Criminal>();
            ShowFindResult();
        }

        public void FindByWeight()
        {
            Console.WriteLine("Введите вес");
            int weight = UserUtils.GetNumberFromUser();
            _foundCriminals = _foundCriminals.Where(criminal => criminal.Weight == weight && criminal.Guarded == false).ToList<Criminal>();
            ShowFindResult();
        }

        public void FindByNationality()
        {
            Console.WriteLine("Введите национальность");
            string nationality = Console.ReadLine();
            _foundCriminals = _foundCriminals.Where(criminal => criminal.Nationality == nationality && criminal.Guarded == false).ToList<Criminal>();
            ShowFindResult();
        }

        public void ShowFindResult()
        {
            Console.WriteLine("");

            foreach(var criminal in _foundCriminals)
                criminal.ShowInfo();
        }
    }
}