Change the css on bundle file

[cakyspary]

I working on mvc websitei have 2 CSS Files one for Arabic users and the other one for English usersbut the first css files add to bundlelike:\[code\]bundles.Add(New StyleBundle("~/Content/css").Include("~/Content/site.css"))\[/code\]i want to add another stylebundlelike:\[code\]bundles.Add(New StyleBundle("~/Content/css").Include("~/Content/site.ar.css"))\[/code\]and change the used one depend on the user selection