Call Events with Delegate in C#

Scenario: Call method of 2^nd Class while calling method of 1^st Class using delegates.

                       “Call friends when employee get promoted”

Example:

    delegate void PromoteDelegate(string eName);

    class Program

    {

        //PM

        static void Main(string[] args)

        {

            Friend f = new Friend();

            Employee e = new Employee();

            e.pd += new PromoteDelegate(f.CallWhenPromoted);

            e.Promoted("Mehul");

            //e.pd();

            Console.ReadLine();

        }

    }

    class Employee

    {

        public event PromoteDelegate pd;

        public void Promoted(string eName)

        {

            Console.WriteLine("Congratulation! Employee {0} 
            get promoted...",eName);

            Console.WriteLine("Calling Delegate...");

            pd("Mehul's friend");

        }

    }

    class Friend

    {

        public void CallWhenPromoted(string fName)

        {

            Console.WriteLine("Thanks for calling {0}...", fName);

        }

    }

  

Output:

            Congratulation! Employee Mehul get promoted...
            Calling Delegate...
            Thanks for calling Mehul's friend...