REM LineNo: 16
REM ExpectedError: BC31088
REM ErrorMessage: 'NotOverridable' cannot be specified for methods that do not override another method.

REM LineNo: 16
REM ExpectedError: BC40005
REM ErrorMessage: sub 'F1' shadows an overridable method in a base class. To override the base method, this method must be declared 'Overrides'.

Class A
    Public Overridable Sub F1()
    End Sub
End Class

Class B
    Inherits A
    Public NotOverridable Sub F1()
    End Sub
End Class


Module OverrideC1
    Sub Main()
    End Sub
End Module