Oddity

[dbasnett]

FWIW - I had a method that looked like this

    Public Sub WontCollapse(Optional para As String = "")

    End Sub

The important part is that it won't allow the method to collapse with one Optional argument.

[dday9]

Confirmed on my end, that's not only odd it does that but also odd that I haven't noticed. Typically I won't setup optional parameters though, I tend to create multiple methods with different signatures. E.g. in your situation:

Public Sub Foo()
    Sub("")
End Sub

Public Sub Foo(para As String)
    ' do something
End Sub

[Shaggy Hiker]

Same here, for the last decade plus. At some point I read that optional parameters were discouraged, though I forget why. It shouldn't be performance, as the compiler could quietly turn an optional parameter into two different methods...and that may be what it does anyways.