Events and Delegates

Class with 2 events

 public class Worker
    {
        // Created 2 events
        public event EventHandler OnCompleted;
        public event EventHandler<WorkerArgs> InBetween;

        public void DoWork(int age, string address)
        {
            for (int i = 0; i < age - 1; i++)
            {
                Thread.Sleep(1000);

                 // Either this way
                //var del= InBetween as EventHandler<WorkerArgs>;
                //if (del != null) del(this,new WorkerArgs(i,address));

                // Or Directly
                if (InBetween != null)  InBetween(this, new WorkerArgs(i, address));
            }

            OnCompleted(this, EventArgs.Empty);
        }
    }

Creating EventArgs

 public class WorkerArgs : EventArgs
    {
        public int Age { get; set; }
        public string Address { get; set; }

        public WorkerArgs(int age,string address)
        {
            this.Age = age;
            this.Address = address;
        }
    }

Main Class

class Program
    {
        static void Main(string[] args)
        {

            Worker w = new Worker();

            w.InBetween += (s, arg) => {
                Console.WriteLine("*");
            };
            w.OnCompleted += (s, arg) => {
                Console.WriteLine("#");
            };

            w.DoWork(10,"Hello");

            Console.Read();
        }

    }

Define the event handlers before the method is called..