HelloWorld.Startup.Configure C# (CSharp) Method

        public void Configure(IApplicationBuilder app)
        {
            app.UseRouting();

            app.UseFluentActions(actions =>
            {
                actions.RouteGet("/").To(() => "Hello World!");
            });

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }