private void ListCliente_Selected(object sender, RoutedEventArgs e)
        {
            ConsultaCliente concli = new ConsultaCliente();

            concli.Show();
            Close();
        }
        private void btVoltar_Click(object sender, RoutedEventArgs e)
        {
            ConsultaCliente consulcli = new ConsultaCliente();

            consulcli.Show();
            Close();
        }