private void bCancelar_Click(object sender, EventArgs e)
 {
     DialogResult = DialogResult.Cancel;
     this.cartel = (GI.BR.Carteles.Cartel)cartelClone.Clone();
     Close();
 }
        private void nuevoCartelDeVentaToolStripMenuItem_Click(object sender, EventArgs e)
        {
            frmFichaCarteles frm = new frmFichaCarteles();
            GI.BR.Carteles.Cartel c = new GI.BR.Carteles.Cartel();
            c.TipoCartel = typeof(GI.BR.Propiedades.Venta);
            c.FechaAlta = DateTime.Today;
            c.FechaVencimiento = DateTime.Today;
            c.Activo = true;
            frm.Cartel = c;
            frm.Text = "Cartel de Venta";

            if (frm.ShowDialog() == DialogResult.OK)
            {
                carteles.Add(c);
                LlenarLista();
            }
        }