7.1

using System;
using System.Collections.Generic;
using System.Linq;
namespace _7._1
{
    class Program
    {
        static void Main(string[] args)
        {
            Database database = new Database();

            database.AddCriminal(new Criminal ("Петя", false, 150, 70, "Русский"));
            database.AddCriminal(new Criminal ("Артем", false, 150, 70, "Русский"));
            database.AddCriminal(new Criminal ("Женька", true, 150, 70, "Русский"));
            database.AddCriminal(new Criminal ("Герман", true, 160, 80, "Немец"));
            database.AddCriminal(new Criminal ("Ян", false, 140, 50, "Китаец"));
            database.AddCriminal(new Criminal ("Роберт", true, 180, 90, "Братанец"));
            database.AddCriminal(new Criminal ("Саул", false, 170, 70, "Казах"));
            database.AddCriminal(new Criminal ("Олег", true, 165, 70, "Кореец"));

            Console.WriteLine("Список всех заключенных:\n");
            database.ShowAllCriminals();

            Console.WriteLine("\nВведите рост:");
            int height = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("Введите вес:");
            int weight = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("Введите национальность:");
            string nationality = Convert.ToString(Console.ReadLine().ToUpper());

            database.FindCriminals(height, weight, nationality);

            Console.ReadKey();
        }
    }

    class Criminal
    {
        public string Fullname { get; private set; }
        public bool IsPrisoned{ get; private set; }
        public int Height { get; private set; }

        public int Weight { get; private set; }
        public string Nationality { get; private set; }

        public Criminal(string fullname, bool isPrisioner, int height, int weight, string nationality)
        {
            Fullname = fullname;
            IsPrisoned = isPrisioner;
            Height = height;
            Weight = weight;
            Nationality = nationality.ToUpper();
        }

        public void ShowInfo()
        {
            Console.WriteLine($"ФИО: {Fullname}. Рост: {Height}. Вес: {Weight}. Национальность: {Nationality}");
        }
    }

    class Database
    {
        private List<Criminal> _criminals;

        public Database() {
            _criminals = new List<Criminal>();
        }

        public void AddCriminal(Criminal criminal)
        {
            _criminals.Add(criminal);
        }

        public void ShowAllCriminals()
        {
            foreach (var criminal in _criminals)
            {
                criminal.ShowInfo();
            }
        }

        public void FindCriminals(int height, int weight, string nationality)
        {
            var filteredCriminals = from Criminal crimanals in _criminals
                                    where crimanals.Height == height &&
                                          crimanals.Weight == weight &&
                                          crimanals.IsPrisoned == false &&
                                          crimanals.Nationality == nationality.ToUpper()
                                    select crimanals;

            Console.WriteLine("\nРезультат поиска: ");
            if (filteredCriminals.Any())
            {
                foreach (var criminal in filteredCriminals)
                {

                    criminal.ShowInfo();
                }
            }
            else
            {
                Console.WriteLine("По вашему запросу нет результатов");
            }
        }
    }
}