Breadcrumb in controller without parameter not works

[viniciushernandes]

Hi,

When my controller has a parameter the breadcrumb works, but when this same controller has no parameter not works. Why?

Example:

Works:
Estructure/Form/12

Not works:
Estructure/Form

My controller is like this:

    public ActionResult Form(int id = 0)
    {
        Structure model = new Structure ();               
        if (id != 0)
        {
            ........            
        }
        return View(model);
    }