lc. lc. - 3 months ago 17
C# Question

Which is preferred: Nullable<>.HasValue or Nullable<> != null?

I always used (a)

Nullable<>.HasValue
because I liked the semantics. However, recently I was working on someone else's existing code base where they used (b)
Nullable<> != null
exclusively instead. Is there a reason to use one over the other, or is it purely preference?

(a)

int? a;
if (a.HasValue)
...


(b)

int? b;
if (b != null)
...

Answer

The compiler replaces null comparisons with a call to HasValue, so there is no real difference. Just do whichever is more readable/makes more sense to you and your colleagues.

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