How can I implement global error handling using middleware in ASP.NET Core 8?

You can implement global error handling by creating a custom middleware. This middleware intercepts exceptions thrown during the request pipeline. Within the middleware, you can log the error, return a user-friendly error response (e.g., a 500 Internal Server Error page), and potentially perform other actions like sending notifications. Register this middleware in your `Startup.cs` (or `Program.cs` in .NET 8) after other middleware but before `app.UseRouting()`.