Sharing object with notification on deletion, "best practice" ?

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#311

From: OD
Date: Mon, 25 Jul 2005 17:48

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Hi all,

once again with a problem of modeling under C# more than a syntax 
problem.
here is the problem :

Class A is showing a property (or accessors, no matter) for a 
collection of object of class P.

users of class A can add and suppress instances of P

Now, I've got a class B that is referencing some instances of P stores 
in A.

Well. Here is the question : what is the best pattern to be sure that 
when the user is deleting an object from the list stores in A, the 
object is no more referenced by the instance of class B ?

Under Delphi I show a few solutions, by example using a notification 
scheme.
But under .NET and C#, destructors are not often used, object are not 
freed, they are just "forgotten" and the GC make the job, destructor 
are not always called, etc.

So, what's the best way to notify instance of Class B that a P object 
stored in A has been deleted ?

I'm not sure to be clear... But i'll appreciate all your ideas :-)

thanks in advance

-- 
Olivier Dahan
MK Query Builder
www.e-naxos.com

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Subject: Sharing object with notification on deletion, "best practice" ?
From: "OD" <OD[.@.]e-naxos.com>
Newsgroups: borland.public.csharpbuilder.language.csharp
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