winform_webApiSelfHost

var baseAddress = ConfigurationManager.AppSettings["baseAddress"];
            var config = new HttpSelfHostConfiguration(baseAddress);
            config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/html"));
            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{action}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );
            var cors = new EnableCorsAttribute("*", "*", "*");
            config.EnableCors(cors);
            var server = new HttpSelfHostServer(config);
            server.OpenAsync().Wait();

<appSettings>
    <add key="baseAddress" value="http://localhost:9002" />
  </appSettings>