sp-dev-fx-webparts/samples/react-sp-elevatedprivileges/api/pnp.api.elevatedprivileges/Global.asax.cs

using System.Web.Http;
using System.Web.Mvc;

namespace pnp.api.elevatedprivileges {
    public class WebApiApplication : System.Web.HttpApplication {
        protected void Application_Start() {
            AreaRegistration.RegisterAllAreas();
            GlobalConfiguration.Configure(WebApiConfig.Register);
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        }
    }
}