Logo Questions Linux Laravel Mysql Ubuntu Git Menu
 

C#: Difference between ' += anEvent' and ' += new EventHandler(anEvent)'

Take the below code:

private void anEvent(object sender, EventArgs e) {
    //some code
}

What is the difference between the following ?

[object].[event] += anEvent;

//and

[object].[event] += new EventHandler(anEvent);

[UPDATE]

Apparently, there is no difference between the two...the former is just syntactic sugar of the latter.

like image 450
Andreas Grech Avatar asked Feb 15 '09 10:02

Andreas Grech


People also ask

What C is used for?

C programming language is a machine-independent programming language that is mainly used to create many types of applications and operating systems such as Windows, and other complicated programs such as the Oracle database, Git, Python interpreter, and games and is considered a programming foundation in the process of ...

What is the full name of C?

In the real sense it has no meaning or full form. It was developed by Dennis Ritchie and Ken Thompson at AT&T bell Lab. First, they used to call it as B language then later they made some improvement into it and renamed it as C and its superscript as C++ which was invented by Dr. Stroustroupe.

Is C language easy?

C is a general-purpose language that most programmers learn before moving on to more complex languages. From Unix and Windows to Tic Tac Toe and Photoshop, several of the most commonly used applications today have been built on C. It is easy to learn because: A simple syntax with only 32 keywords.

How old is the letter C?

The letter c was applied by French orthographists in the 12th century to represent the sound ts in English, and this sound developed into the simpler sibilant s.


3 Answers

There is no difference. In your first example, the compiler will automatically infer the delegate you would like to instantiate. In the second example, you explicitly define the delegate.

Delegate inference was added in C# 2.0. So for C# 1.0 projects, second example was your only option. For 2.0 projects, the first example using inference is what I would prefer to use and see in the codebase - since it is more concise.

like image 163
driis Avatar answered Sep 29 '22 23:09

driis


[object].[event] += anEvent;

is just syntactic sugar for -

[object].[event] += new EventHandler(anEvent);
like image 33
Martin Jonáš Avatar answered Sep 30 '22 01:09

Martin Jonáš


I don't think there is a difference. The compiler transforms the first into the second.

like image 25
Megacan Avatar answered Sep 30 '22 01:09

Megacan