Including an anchor tag in an ASP.NET MVC Html.ActionLink

In ASP.NET MVC, I'm trying to create a link that includes an anchor tag (that is, directing the user to a page, and a specific section of the page).

The URL I am trying to create should look like the following:

<a href="/category/subcategory/1#section12">Title for a section on the page</a>

My routing is set up with the standard:

routes.MapRoute("Default", "{controller}/{action}/{categoryid}"); 

The action link syntax that I am using is:

<%foreach (Category parent in ViewData.Model) { %>
<h3><%=parent.Name %></h3>
<ul>
<%foreach (Category child in parent.SubCategories) { %>
    <li><%=Html.ActionLink<CategoryController>(x => x.Subcategory(parent.ID), child.Name) %></li>
<%} %>
</ul>
<%} %>

My controller method is as follows:

public ActionResult Subcategory(int categoryID)
{
   //return itemList

   return View(itemList);
}

The above correctly returns a URL as follows:

<a href="/category/subcategory/1">Title for a section on the page</a>

I can't figure out how to add the #section12 part. The "section" word is just the convention I am using to break up the page sections, and the 12 is the ID of the subcategory, i.e., child.ID.

How can I do this?