Hi all, i'd like to know how can I get a property like an entity, for example:

My Model:

public class Product {

   public int Id { get; set; }
   public string Name { get; set; }
   public Category Category { get; set; }

}

View:

Name: <%=Html.TextBoxFor(x => x.Name) %>
Category: <%= Html.DropDownList("Category", IEnumerable<SelectListItem>)ViewData["Categories"]) %>

Controller:

public ActionResult Save(Product product)
{
   /// produtct.Category ???
}

and how is the category property ? It's fill by the view ? ASP.Net MVC know how to fill this object by ID ?

Thanks!