private EgresosDAO getEgresosDAO()
 {
     if (egresosDAO == null)
     {
         egresosDAO = new EgresosDAO();
     }
     return egresosDAO;
 }
 //Constructor
 private DisposicionEfectivoCore()
 {
     egresosDAO = new EgresosDAO();
     cierresDAO = new CierreVentasDAO();
 }