Mediator design pattern example

gistfile1.cs

namespace DesignPatterns
{
    public delegate void MessageReceivedEventHandler(string message, string from);
	
	public class Mediator
	{
		public event MessageReceivedEventHandler MessageReceived;
		public void Send(string message, string from)
		{
			if (MessageReceived != null)
			{
				Console.WriteLine("Sending '{0}' from {1}", message, from);
				MessageReceived(message, from);
			}
		}
	}

	public class Person
	{
		private Mediator _mediator;
		public string Name { get; set; }
		public Person(Mediator mediator, string name)
		{
			Name = name;
			_mediator = mediator;
			_mediator.MessageReceived += new MessageReceivedEventHandler(Receive);
		}
		private void Receive(string message, string from)
		{
			if (from != Name)
				Console.WriteLine("{0} received '{1}' from {2}", Name, message, from);
		}
		public void Send(string message)
		{
			_mediator.Send(message, Name);
		}
	}
}