Define a Default Implementation for an Interface?

16 Sep 2006 9:37 PM

mark.milley@binaryswitch.com

Hi all -

Okay, here's a question for all you MVPs out there--I'd like to define
a default implementation for an interface. While I understand that when
you implement a interface, empty routines are created for you (thanks
MS), I'd like to take it one step further and add in comments, and
maybe an If block.

Microsoft does this; for example, implement iDisposable; all of the
code and comments below are created. I'd love to do the same thing. Any
suggestions?

Thanks,

- M

       Private disposedValue As Boolean = False        ' To detect
redundant calls

        ' IDisposable
        Protected Overridable Sub Dispose(ByVal disposing As Boolean)
            If Not Me.disposedValue Then
                If disposing Then
                    ' TODO: free unmanaged resources when explicitly
called
                End If

                ' TODO: free shared unmanaged resources
            End If
            Me.disposedValue = True
        End Sub

#Region " IDisposable Support "
        ' This code added by Visual Basic to correctly implement the
disposable pattern.
        Public Sub Dispose() Implements IDisposable.Dispose
            ' Do not change this code. Put cleanup code in
Dispose(ByVal disposing As Boolean) above.
            Dispose(True)
            GC.SuppressFinalize(Me)
        End Sub

16 Sep 2006 10:14 PM

Jay B. Harlow [MVP - Outlook]

Mark,
Do you want to do this for a specific interface or any interface in general?

For a specific interface I would consider using a Code Snippet that had the
"default implementation" for that interface. Then I would make a point to
use the Code Snippet when implementing the interface...

For any interface in general I would consider writing a macro/program that
created the "default implementation" for an interface...

--
Hope this helps
Jay B. Harlow [MVP - Outlook]
..NET Application Architect, Enthusiast, & Evangelist
T.S. Bradley - http://www.tsbradley.net

<mark.mil***@binaryswitch.com> wrote in message

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