HashSet<T> on Windows Phone 7

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

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/

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

See here

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.