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I'm wondering what's is the difference between this two uses of Add listener on c#. On my script, both are working. But I guess there should be a difference ? Thanks !

btn.onClick.AddListener(() => PickAPuzzle()); 

btn.onClick.AddListener (PickAPuzzle);
Niharika
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tieum67
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1 Answers1

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The two are identical, the first is using a slightly longer form of passing an explicit overload whereas the second is using a method group, where the compiler chooses the correct overload (see: What is a Method Group in C#?).

AddListener() is one and the same, and the delegates they receive are effectively the same. The difference is syntactical shorthand.

Community
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STW
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    Isn't the first line a delegate to a method which will call the method, and the second a direct delegate to the method ? if so, won't the second line be (very, very slightly) more efficient ? – gobes Feb 23 '17 at 11:29
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    @gobes another consideration is if compiler will optimize this and produce the same compiled code – Sharky Feb 23 '17 at 12:21
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    @gobes I misspoke a bit. Both effectively produce the same delegate--one is more explicit, the other less so. – STW Feb 23 '17 at 15:33