using System;

​

​

​

internal class Student

{

    public string Name { get; set; }

    // Listener here get information:

    // 1) who is the sender?

    // 2) more information about the event

    public void Listen(object sender, TeacherEventArgs events)

    {

        Console.WriteLine(Name + " listening to teacher msg = " + events.msg);

    }

}

​

// Implement own custom event!

public class TeacherEventArgs : EventArgs

{

    public readonly string msg;

    public TeacherEventArgs(string message)

    {

         msg = message;

     }

}

​

​

// And use it

internal class Teacher

{

    private int _workHoursPerDay = 0;

​

    public delegate void TeacherHandler(object sender, TeacherEventArgs e);

​

    public event TeacherHandler AboutToOverload;

​

    public void Teach()

    {

        _workHoursPerDay++;

        if (_workHoursPerDay >= 4 && _workHoursPerDay < 6)

        {

            if (AboutToOverload != null)

            {

                AboutToOverload(this, new TeacherEventArgs("TOO MUCH WORK FOR ME! Workhours = " + _workHoursPerDay));

            }

        }

    }

}

​

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}