Jon Skeet's coding blog

I seem to have a knack for discovering corner cases – or in many situations being a corner case.

Introduction and motivation Some of the projects I work on – notably V-Drum Explorer and At Your Service – use MIDI to interact with hardware devices.

I’ve now been through three approaches to load testing for the site, and I think I’ve settled on a solution for the medium term at least.

On January 15th 2026, Robert Jenrick broke my election site.

As I’ve written before, I’m leaning heavily into immutability in the election site code.

In my previous blog post I described some behaviour of C# record types which was unexpected to me, though entirely correct according to the documentation.

Unexpected inconsistency in records The other day, I was trying to figure out a bug in my code, and it turned out to be a misunderstanding on my part as to how C# records work.

Postcodes After a pretty practical previous post about records and collections, this post is less likely to give anyone ideas about how they might tackle a problem in their own project, and doesn’t have any feature requests for Microsoft either.

Records and Collections This post is to some extent a grab-bag of points of friction I’ve encountered when using records and collections within the election site.

Storage Since my last post about the data models, I’ve simplified things very slightly – basically the improvements that I thought about while writing the post have now been implemented.