Sample school - OOP

class Enter
    {
        public static void Main()
        {
            Discipline dis1 = new Discipline("Math", 10, 20, "the science of quantity");
            Discipline dis2 = new Discipline("Biology", 1, 2);
            Discipline dis3 = new Discipline("Informatics", 1000, 20000, "hack the planet");
            List<Discipline> listDisciplines = new List<Discipline>();
            listDisciplines.Add(dis1);
            listDisciplines.Add(dis2);
            listDisciplines.Add(dis3);

            Student stud1 = new Student(1, "Pesho", "very dull");
            Student stud2 = new Student(2, "Mariika");
            List<Student> listStudents = new List<Student>();
            listStudents.Add(stud1);
            listStudents.Add(stud2);

            Teacher teacher1 = new Teacher(listDisciplines, "Nakov", "the boss");
            Teacher teacher2 = new Teacher(listDisciplines, "Goro");
            List<Teacher> listTeachers = new List<Teacher>();
            listTeachers.Add(teacher1);
            listTeachers.Add(teacher2);

            Class class1 = new Class("8A", listTeachers, listStudents);
            List<Class> listClasses = new List<Class>();
            listClasses.Add(class1);

            MySchool theBestSchool = new MySchool(listClasses);

        }
    }

public class Class : Comments
    {
        private string uniqueIdentifier;
        private List<Teacher> listTeachers;
        private List<Student> listStudents;

        public Class(string uniuniqueIdentifier, List<Teacher> listTeachers, List<Student> listStudents)
        {
            this.uniqueIdentifier = uniuniqueIdentifier;
            this.listTeachers = listTeachers;
            this.listStudents = listStudents;
        }
    }

public class Comments
    {
        private string optionalComment;

        public string OptionalComment
        {
            get
            {
                return this.optionalComment;
            }
        }
        public Comments(string optionalComment = null)
        {
            this.optionalComment = optionalComment;
        }
    }

public class Discipline : Comments
    {
        private string name;
        private int numOfLectures;
        private int numOfExercises;

        public string Name
        {
            get
            {
                return this.Name;
            }
        }

        public int NumOfExercises
        {
            get
            {
                return this.numOfExercises;
            }
        }

        public int NumOfLectures
        {
            get
            {
                return this.numOfLectures;
            }
        }

        public Discipline(string name, int numOfLectures, int numOfExercises, string optionalComment = null) : base(optionalComment)
        {
            this.name = name;
            this.numOfLectures = numOfLectures;
            this.numOfExercises = numOfExercises;
        }
    }

public class Human : Comments
    {
        private string name;

        public string Name
        {
            get
            {
                return this.name;
            }
        }

        public Human(string name, string optionalComment = null) : base(optionalComment)
        {
            this.name = name;
        }
    }

public class MySchool
    {
        private List<Class> listClasses;

        public List<Class> ListClasses
        {
            get
            {
                return this.listClasses;
            }
        }

        public MySchool(List<Class> listClasses)
        {
            this.listClasses = listClasses;
        }
    }

public class Student : Human
    {
        private int uniqueClassNum;

        public int UniqueClassNum
        {
            get
            {
                return this.uniqueClassNum;
            }
        }

        public Student(int uniqueClassNum, string name, string optionalComment = null) : base(name, optionalComment)
        {
            this.uniqueClassNum = uniqueClassNum;
        }
    }

public class Teacher : Human
    {
        private List<Discipline> listDisciplines;

        public List<Discipline> ListDisciplines
        {
            get
            {
                return this.listDisciplines;
            }
        }

        public Teacher(List<Discipline> listDisciplines, string name, string optionalComment = null) : base(name,optionalComment)
        {
            this.listDisciplines = listDisciplines;
        }
    }