global authorization not working - results in blank page rendered
===

I am trying to implement a very basic login scheme for my MVC3 site.   If I understand correctly, instead of adding the [Authorize] markup to each of my controller classes, I should be able to simply implement a global setting.  To accomplish this, I have added the following into global.asax:


    
    protected void Application_Start()
    {
        RegisterGlobalFilters(GlobalFilters.Filters);
    }

    public static void RegisterGlobalFilters(GlobalFilterCollection filters)
    {
        filters.Add(new AuthorizeAttribute());  

    }


and in my webconfig, I added:

    <authentication mode="Forms">
       <forms loginUrl="~/Account/LogOn" timeout="2880" />
    </authentication>

The result is that the resulting page is totally blank.  Looking at the url, it seems that  mvc is redirecting to my login route as expected except the page empty.   If I comment out the code in global.asax and just place the [Authorize] markup directly in each contoller, it works as expected.

As a workaround, I have implemented what I have read the MVC2 best practice to be, which was to create a BaseController:Controller class, add the [Authorize] markup to it, and then change the inherentences of all of my controllers to inheret from BaseController instead of Controller.

That seems to work well enough for now.

But why isn't the global.asax implementation working?


