shadows

//defines base class
Public Class parent
//define method
    Public Overridable Sub display()
        System.Console.WriteLine("from parent...")

    End Sub
End Class
//define derived class
Public Class child
    Inherits parent
//shadowing method.....
    Public Shadows Sub display()
        System.Console.WriteLine("from child....")

    End Sub
End Class

Module Module3
    Sub main()
//defining base class variavle
        Dim p As parent
//instantiating derived class  & assigning to base clas variable
        p = New child
//invoking method
        p.display()

    End Sub
End Module