Practical Event Delegate examples

EventDelegate.cs

using System;

namespace RandomMusings
{
  public class Hospital
	{
 		public event AlarmHandler Alarm;
		public delegate void AlarmHandler(string message);
		public Hospital ()
		{
		}
		public void Disaster()
		{
			Alarm("Attack");
		}
	}

	public class Ambulance
	{
		public void Handle(string message)
		{
			switch(message)
			{
				case "Attack":
					Console.WriteLine("Sending Ambulance");
					break;
				default:
					break;
			}
		}
	}

	internal sealed class RushHospital
	{
		public static void Main()
		{
			Hospital h = new Hospital();
			Ambulance a = new Ambulance();

			string via = "postal";
			h.Alarm += (message) => {Console.WriteLine("Sending Ambulance via " + via);};

			h.Disaster();
		}
	}
}