OOP Students Classes Diagram

Build the classes From this Diagram

Example Program.cs

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

namespace ConsoleApplicationExtreemeCourse
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create an Instructor instance
            Instructor jm = new Instructor();
            jm.FirstName = "Jeff";
            jm.LastName = "Meyers";
            jm.ID = "47167";

            //Create a Student object
            Student Sean = new Student();
            Sean.FirstName = "Sean";
            Sean.ID = "666";

            OOP oop = new OOP();    //Create an OOP course

            Console.WriteLine(oop.About());

            ENG101 English = new ENG101(); //Create an English course
            
            jm.AddCourse(oop);  //Add Jeff as instructor of OOP class now jeff 'has a' oop class in his list

            Sean.AddCourse(oop); //Add Sean as Student in OOP class now Sean 'has a' oop class in his list
            Sean.AddCourse(English); //Add Sean as Student in ENG101 class now Sean 'has a' oop class in his list

            Console.WriteLine(jm.SayHello());

            Console.WriteLine(Sean.SayHello());

            Pencil no2 = new Pencil();

            Console.WriteLine(Sean.Write(no2)); //Pencil should be sharp
            Console.WriteLine(Sean.Write(no2)); //Not Sharp any more

            Console.ReadKey();
        }
    }
}

output

CourseName:Object Oriented Programming CoureseNumber:36-2600
Hello my name is Jeff Meyers my ID is 47167
I'm teaching:
CourseName:Object Oriented Programming CoureseNumber:36-2600
Hello my name is Sean  my ID is 666
I'm taking:
CourseName:Object Oriented Programming CoureseNumber:36-2600
CourseName:Writing and Retoric CoureseNumber:42-1000
ConsoleApplicationExtreemeCourse.Pencil is sharp
ConsoleApplicationExtreemeCourse.Pencil is not sharp