Tracing, caching, and C# essentials

I pulled together a pretty mixed issue this time: practical ASP.NET Core work, a bit of performance tuning, some language deep dives, and older-framework maintenance. The tracing piece with user context stood out because it’s the kind of detail that makes production logs actually useful, and the EF Core performance article should get attention from anyone chasing real query wins. There’s also a nice reminder that not every good post is shiny new tech—sometimes it’s GridView, paths, or unit testing basics done well.