Compiler does not find syntax error at compiletime

[PitG]

Here the facts as code sample:

Public Class Class1
Sub ABC(ByVal item As IUnit)
End Sub
End Class

Public Interface IUnit ' or any other Interface
ReadOnly Property Heureka() As Activator
ReadOnly Property Reference() As String
ReadOnly Property Name() As String
End Interface

This client is calling ABC the wrong way!
Public Class Class2
Sub test()
Dim C1 As New Class1
C1.ABC("aberhallo")
End Sub
End Class

the .NET 2.0 Compiler does not see this error at compiletime but at runtime!
We tried sharpening the compiler with all potential options, but no success.

(this kind of bug is produced many times by the VB6 to .NET migration tool -
which is a serious issue if you have about 700 classes to check ...)

Does someone know what went wrong here - or even better to get around this?

[Bob Butler]

Post by PitG
the .NET 2.0 Compiler does not see this error at compiletime but at runtime!