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Tip of the Day
Language: Visual Basic
Expertise: Intermediate
Nov 6, 1998

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Destroying Collections' Items

Many programmers mistakenly believe they can remove all the items from a collection by setting the collection itself to Nothing:

 Dim children as New Collection
...
Set children = Nothing

This technique only works if you don't have another object variable pointing to the same collection. In this case, setting the children variable to Nothing doesn't destroy the collection; instead, it decreases its internal reference counter. The only way to remove all the items of the collection is with a loop of Remove methods:

 Do While children.Count
	children.Remove 1
Loop
Francesco Balena
 
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