mustinheritb.vb

大名鼎鼎的mono是.NET平台的跨平台（支持linux

Option Strict Off
'Author:
'   V. Sudharsan ([e-mail])
'
' (C) 2005 Novell, Inc.

MustInherit Class A
    MustOverride Function fun(ByVal a As Integer)
End Class

MustInherit Class AB
    Inherits A
    MustOverride Function fun1(ByVal a As String)
End Class

Class ABC
    Inherits AB
    Overrides Function fun(ByVal a As Integer)
    End Function
    Overrides Function fun1(ByVal a As String)
    End Function
End Class

Module MustInheritF
    Function Main() As Integer
    End Function
End Module