How can I combine two fields in a SelectList text description?

I want put in a selected list labels the name and surname of people of an EF model. I've tried with this:

public ActionResult Insert()
        {
            ViewData["accountlist"] = new SelectList(time.Anagrafica_Dipendente.ToList(), "ID_Dipendente", "Surname Name", null);             
            Giustificativi g = new Giustificativi();
            return View(g);
        }

but VS returns an error, because there isn't a attribute called "surname name". how can i concat the name and surname in the selectlist label?

thanks

you could do something like this:

ViewData["accountlist"] = 
    new SelectList((from s in time.Anagrafica_Dipendente.ToList() select new { 
        ID_Dipendente=s.ID_Dipendente,
        FullName = s.Surname + " " + s.Name}), 
        "ID_Dipendente", 
        "FullName", 
        null);