3Lab

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _3Lab
{
    class Program
    {
        static void Main(string[] args)
        {
            Enrolee enrolee = new Enrolee("Ivan", 200, "Повар");

            Student student = new Student();

            enrolee = (Enrolee)student;

            student = (Student)enrolee;

            if (student == null)
            {
                Console.WriteLine("Ошибка!");
            }
            else if (student != null)
                Console.WriteLine(student.Name);
        }
    }

    class Enrolee
    {
        public string Name { get; set; }

        public int EntrancePoints { get; set; }

        public string Specialization { get; set; }

        public Enrolee()
        {
            Name = "No name";
            EntrancePoints = 0;
            Specialization = "No xxx";
        }

        public Enrolee(string name ,int entrancePoints, string specialization)
        {
            Name = name;
            EntrancePoints = entrancePoints;
            Specialization = specialization;
        }

        public void EnterInfo()
        {
            Name = Console.ReadLine();

            EntrancePoints = Convert.ToInt32(Console.ReadLine());

            Specialization = Console.ReadLine();

        }
    }

    class Student : Enrolee
    {
        public bool RecordBook { get; set; }
        public int StudentID { get; set; }

        public Student()
        {
            RecordBook = true;
            ++StudentID;
        }
        public Student(string name, int entrancePoints, string specialization)
            : base(name, entrancePoints, specialization)
        {
            RecordBook = true;
            ++StudentID;
        }

        public Student(Enrolee enrolee)
        {
            RecordBook = true;
            ++StudentID;
        }

        public Student(string name, int entrancePoints, string specialization, bool recordBook, int studentID)
            : base(name, entrancePoints, specialization)
        {
            RecordBook = recordBook;
            StudentID = studentID;
        }
        public void SetDefault()
        {

        }

        //public Student(string name, int entrancePoints, string specialization)
        //    : base(name, entrancePoints, specialization)
        //{


        //}
    }

    class Extrabudgetary : Student
    {
        public bool EducationСontract { get; set; }

        public Extrabudgetary(string name, int entrancePoints, string specialization, bool recordBook, int studentID, bool educationContract)
            : base(name, entrancePoints, specialization, recordBook, studentID)
        {
            EducationСontract = educationContract;
        }
    }

    class Budgetary : Student
    {
        public bool Stipend { get; set; }

        public Budgetary(string name, int entrancePoints, string specialization, bool recordBook, int studentID, bool stipend)
            : base(name, entrancePoints, specialization, recordBook, studentID)
        {
            Stipend = stipend;
        }
    }
}