What is the order of middleware in ASP.NET Core?

What is the order of middleware in ASP.NET Core?

In ASP.NET Core, middleware is executed in the order it is registered in the Startup class. The first middleware registered is the first to handle requests.

Can you give me an example of how to set up middleware in the Startup class?

Sure! In the Configure method of your Startup class, you can add middleware like this:

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    app.UseRouting();
    app.UseAuthentication();
    app.UseAuthorization();
    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllers();
    });
}

What happens if I change the order of middleware?

Changing the order can significantly affect the behavior of your application. For example, if you place authentication middleware after authorization, users may not be authenticated when trying to access protected resources.

Are there any best practices for ordering middleware?

Yes, a common practice is to place error handling middleware first, followed by authentication, then authorization, and finally routing and endpoint handling.