MVC 4 Custom template for bool (razor)

Question

I am using the twitter bootstrap framework, so to get the EditorFor and DisplayFor methods to output what I need, I created custom templates for each of the types like string, t

Answer 1

Reading the responses so far, I started wondering about how the model object was being initialized. So this is rather weird, but I found the answer. Hopefully someone can explain the weirdness. Might be how MVC initializes a model object if you don't specify one.

The default MVC Internet template has the following for the Login action:

[AllowAnonymous]
public ActionResult Login(string returnUrl)
{
    ViewBag.ReturnUrl = returnUrl;

    return View();
}

That gives the error. Changing it to the following however, fixes the problem:

[AllowAnonymous]
public ActionResult Login(string returnUrl)
{
    var loginModel = new LoginModel();

    ViewBag.ReturnUrl = returnUrl;

    return View(loginModel);
}

So this answers the question on how to solve the problem, but still leaves the reason unresolved. Could it be because MVC creates an instance of the object in a different way, say with reflection or something?