Hands-On RESTful Web Services with ASP.NET Core 3

Overview of the routing system

The routing system of ASP.NET Core maps an incoming request to a route handler. In ASP.NET Core, the Startup class is responsible for configuring the routes that are needed by the application. Furthermore, the routing functionalities of ASP.NET Core are implemented using a middleware approach. Let's take a closer look at the Startup class and how it initializes the routing system:

public class Startup{    ...        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)    {        app.UseRouting();        ...        app.UseEndpoints(endpoints =>        {            endpoints.MapControllers();        });    }}

The preceding code uses two extension methods: UseRouting and UseEndpoints. These methods were introduced in the latest release of ASP.NET Core. ...