HashSet<T> on Windows Phone 7

Is there no System.Collections.Generi开发者_如何学Cc.HashSet on Windows Phone 7?

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The Windows Phone 7 .NET libraries are comparable to what is provided in Silverlight 3.0 (which doesn't have HashSet). You can build something like a HashSet using a Dictionary. For example, see this MSDN forum post: http://social.msdn.microsoft.com/Forums/en-US/windowsphone7series/thread/e1dd3571-dfb8-4abe-b63a-62106d6a4965/

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It is not supported on Windows Phone. Windows Phone version of Silverlight contains some parts of regular Silverlight but not all.

See here

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It is supported in SL4

HashSet(Of T) Class

However on Widows Phone 7, is compatible with Silverlight 3.0 API and SL 4 is not supported. So the answer is no, you can not use HashSet for Windows Phone 7 yet.