Editor's note
I kept this issue intentionally mixed: there’s practical app work, platform news, and a few architecture pieces. The ASP.NET Core 9 performance write-up and the .NET 10 field keyword change are the two I’d especially watch, because both can affect real code fast.
ASP.NET Core 9 performance, .NET 10 changes
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Today's Articles
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Jasen's take on today's picks
Difference between IQueryable, IEnumerable, IList, ICollection & IDictionary
A useful refresher on how the collection interfaces differ when you’re choosing the right abstraction.
ASP.NET Core 9 APIs — Faster Endpoints for C# Developers
The Minimal APIs performance piece is the kind of concrete improvement that can change defaults in real services.
Managing .NET App Configuration With The Options Pattern in ASP.NET Core 9 — Part 1
The .NET 10 field keyword article is worth a careful read before you upgrade.
Smarter Refactoring in C#: How AI Helps Engineers Build More Scalable Enterprise Applications
Good practical logging advice here; better context still pays off more than volume.
.NET 10 Breaking Changes: The New field Keyword
The sovereign cloud announcement matters if you build for regulated or public-sector environments.
Reinventing how .NET Builds and Ships (Again) - .NET Blog
The rate limiting and domain events posts are solid architecture reminders for scalable APIs.


















