Add woocommerce.css in template?

by 

function woocommmerce_style() {
   wp_enqueue_style('woocommerce_stylesheet', WP_PLUGIN_URL. '/woocommerce/assets/css/woocommerce.css',false,'1.0',"all");
}
add_action( 'wp_head', 'woocommmerce_style' );

paste the above code in your “functions.php”. woocommerce stylesheet will be executed to your site