using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using Microsoft.Win32;
//using System

namespace лаба_2_СПИСКИ
{

    class Student
    {
        public string Name { get; set; }
        public string SurName { get; set; }
        public string MidName { get; set; }
        public string Gender { get; set; }
        public Student() { }
        public Student(string n, string sn, string mn, string g)
        { Name = n; SurName = sn; MidName = mn; Gender = g; }

    }
    class Program
    {
        [STAThread]
        static void Main(string[] args)
        {

            LinkedList<Student> Students = new LinkedList<Student>();
            FileStream FS = null;
            string S=null;
            System.Windows.Forms.OpenFileDialog dlg = new System.Windows.Forms.OpenFileDialog();
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                S = dlg.FileName;
            if (S == null)
                return;
           // FS = new FileStream("Список_студентов.txt", FileMode.Open);
            using (StreamReader FI = new StreamReader(S))
            {
                while ((S = FI.ReadLine()) != null)
                {
                    string[] str = S.Split(';');
                    Students.AddLast(new Student(str[0], str[1], str[2], str[3]));
                }
            }
            if (FS != null)
                FS.Dispose();



            Console.WriteLine("Cписок:");
            foreach (Student St in Students)
                Console.WriteLine("{0} {1} {2} {3}", St.Name, St.SurName, St.MidName, St.Gender);

            Students.AddFirst(new Student("Бурлина", "Виктория", "Сергеевна", "жен1"));

            Students.AddLast(new Student("Юдаков", "Даниил", "Сергеевич", "м"));

            Students.AddBefore(Students.Last, new Student("Капсюлькин", "Данила", "Павлович", "мужской"));

            Students.Remove(Students.First.Next.Next);

            LinkedList<Student> NewStudents = new LinkedList<Student>(Students);
            Students.Clear();

            Console.WriteLine("\n\nОкончательный список:");
            foreach (Student St in NewStudents)
                Console.WriteLine("{0} {1} {2} {3}", St.Name, St.SurName, St.MidName, St.Gender);

            Console.WriteLine("\n\nВывести мальчиков(муж.) или девочек(жен.)?");
            string Gend = Console.ReadLine();
            int NFin;
            string s1 = "муж";
            int n1 = s1.Trim().Length;
            string s2 = "жен";
            if (Gend == "муж.")
            {
                foreach (Student St in NewStudents)
                {
                    if (n1 >= St.Gender.Trim().Length)
                        NFin = St.Gender.Trim().Length;
                    else
                        NFin = n1;
                    if (String.Compare(s1.Substring(0, NFin), St.Gender.Substring(0, NFin)) == 0)
                        Console.WriteLine("{0} {1} {2} {3}", St.Name, St.SurName, St.MidName, St.Gender);
                }
            }
            else if (Gend == "жен.")
            {
                foreach (Student St in NewStudents)
                    if (String.Compare(s2.Substring(0, 3), St.Gender.Substring(0, 3)) == 0)
                        Console.WriteLine("{0} {1} {2} {3}", St.Name, St.SurName, St.MidName, St.Gender);
            }
            else
                Console.WriteLine("Студент такого пола не найден!");


            Console.ReadKey();
        }
    }
}