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ASP.NET Core 9: Discover the new developer Exception page

2025-01-06 by anthonygiretti

Introduction

ASP.NET Core 9 has arrived and brings interesting novelties, especially on debugging. In this post, I will show the new Exception developer page.

The new Exception developer page

The developer exception page now includes endpoint metadata (Routing, Headers Query, Cookies), with consistent formatting, making debugging easier. The interface is really handy!

As a demo, I picked up James Newton-King‘s mini video, which is perfect. I don’t need to create my own, so here it is:

Enjoy debugging on ASP.NET Core 9 ! 🙂

Written by

anthonygiretti

Anthony is a specialist in Web technologies (14 years of experience), in particular Microsoft .NET and learns the Cloud Azure platform. He has received twice the Microsoft MVP award and he is also certified Microsoft MCSD and Azure Fundamentals.