I have a sample program here that has one event with 2 different event
handlers (onButtonAction and onButtonAction2).

I had defined the event as:

   public event ButtonEventHandler ButtonClick;

where ButtonEventHandler is a delegate type with 2 parameters: one is an
object and the other is an int.

I then do:
       b.ButtonClick += new ButtonEventHandler(onButtonAction);
       b.ButtonClick += new ButtonEventHandler(onButtonAction2);

       b.ButtonClick += new ButtonEventHandler(onButtonAction);
       b.ButtonClick += new ButtonEventHandler(onButtonAction2);

I have added 4 event handlers to the ButtonClick event and they all have the
same type (object and int) as defined by the delegate:

delegate void ButtonEventHandler(object source, int clickCount);

I was just curious if you an event handler can only have one delegate (same
parameters)?

I can have as many handlers as I want (not sure why I would need to) but
they all have to be the same delegate type.

Is this always the case?

****************************************
using System;

//declaring the event handler delegate
delegate void ButtonEventHandler(object source, int clickCount);

class Button
{
   //declaring the event
   public event ButtonEventHandler ButtonClick;

   //Function to trigger the event
   public void clicked(int count)
   {
       Console.WriteLine("\nInside Clicked !!!");
       //Invoking all the event handlers
       if (ButtonClick != null) ButtonClick(this, count);
   }
}
public class Dialog
{
   public Dialog()
   {
       Button b = new Button();

       //Adding an event handler
       b.ButtonClick += new ButtonEventHandler(onButtonAction);
       //Triggering the event
       b.clicked(1);

       b.ButtonClick += new ButtonEventHandler(onButtonAction2);
       b.clicked(1);

       //Removing an event handler
       b.ButtonClick += new ButtonEventHandler(onButtonAction);
       b.clicked(1);

       b.ButtonClick += new ButtonEventHandler(onButtonAction2);
       b.clicked(1);
   }
   static void Main()
   {
       new Dialog();
       Console.Read();
   }

   //Event Handler function
   public void onButtonAction(object source, int clickCount)
   {
       Console.WriteLine("Inside Event Handler !!!");
   }
   public void onButtonAction2(object source, int clickCount)
   {
       Console.WriteLine("Inside Event Handler 2 !!!");
   }
}
****************************************

Thanks,

Tom