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If I have an Action like this: public ActionResult DoStuff(List<string> stuff) { ... ViewData["stuff"] = stuff; ... return View(); } I can hit it with the following URL: http://mymvcapp.com/controller/DoStuff?stuff=hello&stuff=world&stuff=foo&stuff=bar But in my ViewPage, I have this code: <%= Html.ActionLink("click here", "DoMoreStuff", "MoreStuffController", new { stuff = ViewData["stuff"] }, null) %> Unfortunately, MVC is not smart enough to recognize that the action takes an array, and unrolls the list to form the proper url route. instead it just does a .ToString() on the object which just lists the data type in the case of a List. Is there a way to get Html.ActionLink to generate a proper URL when one of the destination Action's parameters is an array or list? -- edit -- As Josh pointed out below, ViewData["stuff"] is just an object. I tried to simplify the problem but instead caused an unrelated bug! I'm actually using a dedicated ViewPage<T> so I have a tightly coupled type aware Model. The ActionLink actually looks like: <%= Html.ActionLink("click here", "DoMoreStuff", "MoreStuffController", new { stuff = ViewData.Model.Stuff }, null) %> Where ViewData.Model.Stuff is typed as a List

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