Query Linq C #

I have a small problem and I find a solution.

I have to take the name of a person and with the name of the school

    DB_Entities db = new DB_Entities();   // es generada por el Entitie framework
    public JsonResult GetPersona(string codPersona)
    {
        int id = Convert.ToInt32(codPersona);

        var persona = (from pe in db.Persona
                       join co in db.Colegio on pe.CodColegio equals co.IdColegio
                       where pe.CodPersona == id
                       select new
                       {
                           NombreCompleto = pe.NombreCompleto,
                           Colegio = co.Nombre
                       }).FirstOrDefault();

        return new JsonResult { Data = persona, JsonRequestBehavior = JsonRequestBehavior.AllowGet };
    }