I guess this is not exactly news, but IIf does not provide short circuiting. Both the True and False paths are evaluated. I’m sure I ran into this before and just forgot about it, but I wanted to post this so hopefully I will remember not to use IIf as a null check for an object b/c it will pass/use the Null despite the result of the boolean evaluation:
Dim agencyId As Integer = _
IIf(agencyCode IsNot Nothing, SomeMethodThatNoLikeNull(agencyCode), 0)
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Yes, most people dont realize that one until the code has been running and the empty object comes through and the exceptions start to flow.
I never use the IIf syntax, I only use AndAlso,OrElse. these will shortcut, so you can put your nothing check first and the comparison second.
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