asp.net mvc 3 - selected menu item in mvc3 -

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i creating first mvc3 application (no previous mvc either) wanting create top level menu , able add "selected" or "active" css class select li tag. found link active menu item - asp.net mvc3 master page ihave tried add class error "error 1 'system.web.mvc.htmlhelper' not contain definition 'actionlink' , no extension method 'actionlink' accepting first argument of type 'system.web.mvc.htmlhelper' found (are missing using directive or assembly reference?) g:\mvcmusicstore-v2.0\mvcmusicstore-completed\mvcmusicstore\helpers\htmlhelpers.cs 26 31 mvcmusicstore "

so thinking missing reference don't know what. can kindly tell me need reference work.

add following using @ top of htmlhelpers.cs file:

using system.web.mvc.html;

now htmlhelper.actionlink line should compile fine.


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