List<T>.Sort

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Willi Vogl - 23 Oct 2007 13:25 GMT

Hi,

does anybody have an idea why the List<T>.Sort method is not virtual?
Would be fine to allow subclassing with customer sort implementation to
get e.g. stability for the sort operations.

Br,
Willi

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Mattias Sjögren - 23 Oct 2007 20:21 GMT

>does anybody have an idea why the List<T>.Sort method is not virtual?

The List class isn't designed to be derived from. Instead the
designers prioritized performance and made methods non-virtual.

Mattias

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Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

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Ben Voigt [C++ MVP] - 01 Nov 2007 16:37 GMT

> >does anybody have an idea why the List<T>.Sort method is not virtual?
>
> The List class isn't designed to be derived from. Instead the
> designers prioritized performance and made methods non-virtual.

Also, the IList interface doesn't include the Sort method, neither does List
implement any ISortableContainer interface. That seems like a serious
omission.

> Mattias

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