LINQ-1

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

namespace Homework1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<Criminal> criminals = new List<Criminal>
            {
                new Criminal("a",false,185,90,"A"),
                new Criminal("b",false,175,80,"A"),
                new Criminal("c",true,165,70,"C"),
                new Criminal("d",true,160,65,"B"),
            };

            int userHeight = GetMeasurement("Высота");
            int userWeight = GetMeasurement("Вес");

            Console.Write("Введите национальность:");
            string userNationality = Console.ReadLine();

            var filteredCriminals = criminals.Where(criminal => criminal.Height == userHeight &&
                                                    criminal.Weight == userWeight &&
                                                    criminal.Nationality == userNationality &&
                                                    criminal.IsPrisoned == false);

            foreach (var criminal in filteredCriminals)
            {
                Console.WriteLine($"|{criminal.Initials}|");
            }

            Console.ReadKey();
        }

        static int GetMeasurement(string parameter)
        {
            int userMeasurement;

            do
            {
                Console.Write($"Введите параметр({parameter}):");
            }
            while (int.TryParse(Console.ReadLine(), out userMeasurement) == false);

            return userMeasurement;
        }
    }

    class Criminal
    {
        public string Initials { 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 initials, bool isPrisoned, int height, int weight, string nationality)
        {
            Initials = initials;
            IsPrisoned = isPrisoned;
            Height = height;
            Weight = weight;
            Nationality = nationality;
        }
    }
}