using System;

using System.Collections;

using System.Linq;

using System.Collections.Generic;

​

​

namespace Lab7

{

    public enum Gender { male, female }

    public class Student

    {

        private string id;

        public string ID

        {

            get

            {

                return id;

            }

            set

            {

                id=value;

            }

        }

        private string name;

        public string Name

        {

            get

            {

                return name;

            }

            set

            {

                name=value;

            }

        }

        private Gender Gender { get; set; }

​

        public Student(string id, string name, Gender gender)

        {

            ID = id;

            Name = name;

            Gender = gender;

        }

        public override string ToString()

        {

            return "\n"+ "ID: " + ID + "\n" + "Name: " + Name + "\n" + "Gender: " + Gender; 

        }

    }

    public class StudentClass

    {

        private String CRN { get; set; }

        private String LecturerName { get; set; }

        private ArrayList ClassStudents;

​

        public StudentClass(String crn, String Lecturername)

        {

            CRN = crn;

            LecturerName = Lecturername;

            ClassStudents = new ArrayList();

        }

        public int Length

        {

            get

            {

                return ClassStudents.Count;

            }

        }

        public void AddStudents(Student student)

        {

            foreach (Student currentStudent in ClassStudents)

            {

                if (currentStudent.ID == student.ID)

                {

                    throw new ArgumentException("Error: An ID has already been assigned to: " + currentStudent.Name);

                }

            }

            ClassStudents.Add(student);

​

​

​

        }

        public override string ToString()

        {

            string output = String.Empty;

            foreach (Student s in ClassStudents)

            {

                output += s +"\n"+ "is in " + LecturerName + " class" + "\n";

            }

            return output;

​

        }

    }

    public class Test

    {

        public static void Main()

        {

            try

            {

​

                StudentClass garyClass = new StudentClass("0555", "GaryClynch");

                garyClass.AddStudents(new Student("0123", "Romain Piccolo", Gender.male));

                garyClass.AddStudents(new Student("0124", "Layla Piccolo", Gender.female));

                garyClass.AddStudents(new Student("0125", "Leo Piccolo", Gender.male));

                garyClass.AddStudents(new Student("0126", "Kate Piccolo", Gender.female));

                Console.WriteLine(garyClass.ToString());

                Console.WriteLine(garyClass.Length);

                garyClass.AddStudents(new Student("0126", "Kate Piccolo", Gender.female));

​

​

​

            }

            catch (Exception e)

​

            {

                Console.WriteLine(e.Message);

            }

​

        }

    }

}

​

​

​