Automatic URL Parameter Encoding Failing

Automatic URL Parameter Encoding Failing

Background
In HomeController.cs I have:
[HttpGet]
public GetPerson(string name)
{
return View(new PersonModel { ... });
}
In Global.asax.cs I have:
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
"Word", "person/{name}",
new { controller = "Home", action = "GetPerson" });
routes.MapRoute(
"Default", "{controller}/{action}",
new { controller = "Home", action = "Index" });
}
In SomePage.cshtml I have, effectively, this:
@{ var name = "Winston S. Churchill"; }
<a href="@Url.Action("GetPerson", "Home", new { name })">@name</a>
Problem
If I click the link for Winston S. Churchill, I am routed to the URL
http://localhost/person/Winston%20S.%20Churchill, which yields the
standard 404 page:
HTTP Error 404.0 - Not Found
The resource you are looking for has been removed, had its name changed,
or is temporarily unavailable.
This only happens if the name variable contains a . (period). All my code
works perfectly fine when the name is, for example, Winston Churchill.
How can I make ASP.NET MVC 3 percent-encode the . (period) in the URL?



Unacceptable Workaround
If I change the route to the following, everything works.
routes.MapRoute(
"Word", "person",
new { controller = "Home", action = "GetPerson" });
However, the URL becomes
http://localhost/person?name=Winston%20S.%20Churchill, which isn't what I
want. I want the name in the path part of the URL, not the query.