Passing an empty IEnumerable argument to a method

Posted by avance70 on Stack Overflow See other posts from Stack Overflow or by avance70
Published on 2010-05-05T13:12:42Z Indexed on 2010/05/05 13:18 UTC
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Filed under:

c#

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ienumerable

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argument-passing

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generics

I have this method (simplified):

void DoSomething(IEnumerable<int> numbers);

And I invoke it like this:

DoSomething(condition==true?results:new List<int>());

The variable results is formed with a LINQ select condition (IEnumerable).

I was wondering is this List<int>() the best way (the fastest?) to pass an empty collection, or is new int[0] better? Or, something else would be faster, a Collection, etc.? In my example null wouldn't be ok.

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