.htaccess in PHP 5.6 and Plesk

using System.Web.Http;
namespace WebService
{
    public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            // New code ((((((important this (config.EnableCors) item ))))))
            config.EnableCors();

            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );
        }
    }
}

    using System.Net.Http;
    using System.Web.Http;
 //((((((important this (using System.Web.Http.Cors) item ))))))
    using System.Web.Http.Cors;

    namespace WebService.Controllers
    {
 //((((((important this (EnableCors) item ))))))
        [EnableCors(origins: "http://mywebclient.azurewebsites.net", headers: "*", methods: "*")]
        public class TestController : ApiController
        {
            // Controller methods not shown...
        }
    }