netcore3.1 open configuration webapi Controller error

Problem Description: just configured the swagger, follow netcore2.2 api controller configuration continue to open in the browser, the result of the error. . .

Solution: Find route level, the reasons for a long time, to no avail, and finally the api page in the normal cross-domain set up, and it seems set about post cross removed, continue to find, turned out to be a problem due to the order of registration time

        // . This Method Called by the gets the Use The Runtime the this Method to the HTTP Request The Configure Pipeline. 
        Public  void the Configure (App IApplicationBuilder, IWebHostEnvironment the env) 
        { 
            app.UseStaticFiles (); 
            app.UseCookiePolicy (); 
            app.UseRouting (); 
            / / allow cross-domain position and must be put right, otherwise an error loading 
            app.UseCors ( " the any " ); 
            app.UseEndpoints (endpoints => endpoints.MapDefaultControllerRoute ()); 

            // enable middleware services generated Swagger as JSON endpoint 
            app. UseSwagger ();
             // enable middleware services to swagger-ui, designated Swagger JSON endpoint
            app.UseSwaggerUI(c =>
            {
                c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1");
            });

            var log = LogManager.GetLogger(repository.Name, typeof(Startup));
            log.Info("Start Runing");
        }

Set Loading UseRouting cross-domain must be placed intermediate and UseEndpoints

Reference Links: https://www.cnblogs.com/puzi0315/p/12197612.html