Nullable type with inline if cannot work together?

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Further to Damien’s answer, the clean way to do this is to not use Nothing, but New Double? instead:

Dim width As Double? = If(widthStr Is Nothing, New Double?, CDbl(widthStr))

And now that the type of the If expression is correct, this could be reduced to:

Dim width = If(widthStr Is Nothing, New Double?, CDbl(widthStr))

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