Over the years we’ve seen .NET mature and change since v1. We’ve seen server technologies mature in many ways. Things we did yesterday don’t necessarily work the same way today. One of those things that recently struck me was how request timeouts work in IIS. If like me, you just assumed they worked the same in .NET Core then I invite you to join me on this journey. Let’s explore how to make ASP.NET Core request timeouts work properly with IIS in-process hosting mode.