问使用Owin时无法使ASP.NET Web API 2帮助页正常工作

EN

Install-Package Microsoft.AspNet.WebApi.HelpPage -Pre 

    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            //Required for MVC areas new HttpConfiguration() doesn't work with MVC
            var config = GlobalConfiguration.Configuration;

            AreaRegistration.RegisterAllAreas();

            WepApiStartup.Configure(config);

            app.UseWebApi(config);

        }
    }