c# - The Name 'CommonFolderQuery' does not exist in current context -

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i trying music files windows phone 8.1 , want group them artist. following documentation.

// music folders present in music library ireadonlylist<istorageitem> musicfolders = await knownfolders.musiclibrary.getfoldersasync(commonfolderquery.groupbyartist);

but error shown. reason? did miss using directive or assembly reference??

the commonfolderquery enumeration located in windows.storage.search namespace.

make sure you've included using directive @ top of file:

using windows.storage.search;

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