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Why `as` is giving null for nullable value types?

General Tech Bugs & Fixes

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User

( 7 months ago )

long? i = 10000;
int? s = i as int?;

Why is it giving me a null in s variable? I know that casting it using int? s = (int?)i; will work fine but why can't I use an as operator?

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User

( 7 months ago )

The code is equivalent to the following expression except that the expression variable is evaluated only one time.

expression is type ? (type)expression : (type)null

Since i is int? is false the as keyword will return (int?)null.

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