EventHandler confusion

1. There is no difference. Back in C# 1.1, you had to add an event handler by explicitly creating a new delegate using "new". C# 2.0 added a feature called "Delegate Inference", which lets you assign a method to an event or delegate without using "new" and wrapping it in the delegate name. Both give the same exact result, and compile to the same IL.

2. An event handler is a delegate. See events in C# are just multicast delegates: when you fire off an event it says "okay, let call all the delegates that are assigned to me".

Now don't confuse with with EventHandler, which is type of delegate that's part of the .NET Framework Library. See whenever you declare an event, you have to also supply the type of delegate that has to be used for event handlers. EventHandler is considered the most "basic" type of delegate used for events in the .NET Framework Library. So for instance you could create a custom event like this:

class McDonalds{    public delegate void CheeseBurgerDelegate(CheeseBurger burger);    public event CheeseBurgerDelegate BurgersReady;}

Notice how you create the delegate first describing the layout of a method that can subscribe to the event, then you actually make the event.