interfacep.vb

大名鼎鼎的mono是.NET平台的跨平台（支持linux

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

Imports System

Interface A
    Function A1() As Object
End Interface

Class B
    Implements A
    Public Function A1() As Object Implements A.A1
    End Function
End Class

Class C
    Inherits B
End Class

Module A2
    Function Main() As Integer
        Dim x As A = New B()
        Dim x1 As C = New C()
        x = x1
    End Function
End Module