Owin.Loader.DefaultLoader.Load C# (CSharp) Method

        public Action<IAppBuilder> Load(string startupName)
        {
            return LoadImplementation(startupName) ?? _next(startupName);
        }

        private IntegratedPipelineBlueprint InitializeBlueprint()
        {
            IntegratedPipelineBlueprintStage firstStage = null;

            string appStartup = ConfigurationManager.AppSettings[Constants.OwinAppStartup];
            var loader = new DefaultLoader();
            Action<IAppBuilder> startup = loader.Load(appStartup ?? string.Empty);
            if (startup == null)
            {
                return null;
            }

            var appContext = OwinBuilder.Build(builder =>
            {
                EnableIntegratedPipeline(builder, stage => firstStage = stage);
                startup.Invoke(builder);
            });

            if (appContext == null)
            {
                return null;
            }

            string basePath = Utils.NormalizePath(HttpRuntime.AppDomainAppVirtualPath);

            return new IntegratedPipelineBlueprint(appContext, firstStage, basePath);
        }