连接事件处理程序

Question

Is there a difference between

Object.Event += new System.EventHandler(EventHandler);
Object.Event -= new System.EventHandler(EventHandler);

AND

Object.Event += EventHandler;
Object.Event -= EventHandler;

? If so, what?

Aren't they both just pointers to methods?

Answer 1

Both are Exactly same. But

Object.Event += EventHandler;
Object.Event -= EventHandler;

The above example compiles fine only in 3.0 or later version of C#, while if you are in 2.0 or before you can only use following construct.

Object.Event += new System.EventHandler(EventHandler);
Object.Event -= new System.EventHandler(EventHandler);

Look more about at Type inferencing . search for "Type Inference"

Answer 2

No, they are exactly the same. The second version is purely a shorthand where the compiler creates an instance of the event handler for you. Just like simplified property syntax, using etc... all compiler magic!

See this related question:

Difference between wiring events using "new EventHandler<T>" and not using new EventHandler<T>"?