C # event delegation case

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace TDelegate{    public delegate void MyHandler1(object sender, MyEventArgs e);    public delegate void MyHandler2(object sender, MyEventArgs e);    public class Program    {        public static void Main()        {            B b = new B();            A a = new A(b);            MyEventArgs e1 = new MyEventArgs();            MyEventArgs e2 = new MyEventArgs();            e1.m_id = "Event args for event 1";            e2.m_id = "Event args for event 2";            b.FireEvent1(e1);            b.FireEvent2(e2);            Console.ReadKey();        }    }    class A    {        public A(B b)        {            b.Event1 += new MyHandler1(OnHandler1);            b.Event2 += new MyHandler2(OnHandler2);        }        public const string m_id = "Class A";        public void OnHandler1(object sender, MyEventArgs e)        {            Console.WriteLine("I am in OnHandler1 and MyEventArgs is {0}", e.m_id);        }        public void OnHandler2(object sender, MyEventArgs e)        {            Console.WriteLine("I am in OnHandler2 and MyEventArgs is {0}", e.m_id);        }    }    class B    {        public event MyHandler1 Event1;        public event MyHandler2 Event2;        public void FireEvent1(MyEventArgs e)        {            if (Event1 != null)            {                Event1(this, e);            }        }        public void FireEvent2(MyEventArgs e)        {            if (Event2 != null)            {                Event2(this, e);            }        }    }    public class MyEventArgs    {        public string m_id;    }}