Public MustInherit Class Cls1
Public MustOverride Function greet1() As String
End Class
Public MustInherit Class Cls2
Inherits Cls1
Public MustOverride Function greet2() As String
End Class
Public Class Cls3
Inherits Cls2
Public Overrides Function greet1() As String
End Function
Public Overrides Function greet2() As String
End Function
End Class
|