Editor's note
I curated a pretty wide mix today, from language and runtime updates to tooling, data, and security. The C# 14 announcement and the inline arrays piece both stand out for developers who care about what ships next and what helps right now. I also liked the Azure SQL vector indexing preview because it hints at practical search and AI workloads without leaving the .NET stack.
C# 14, testing, and performance wins
Jasen Fici
November 27, 2025
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Today's Articles
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Jasen's take on today's picks
Inline Arrays in C# 13: The Secret Performance Feature You’re Probably Ignoring
A small language feature with an outsized payoff: inline arrays can remove allocations in hot paths without rewriting your whole design.
The Best Way to Write Parameterized Tests in .NET Using xUnit (Clean, Fast, and Not Annoying)
A clean xUnit parameterized-testing approach is worth reading if you want less ceremony and more readable test cases.
C# 14 is the headline runtime/language update here, with the .NET 10 connection making it especially relevant for planning upgrades.
489: .NET 10 and Visual Studio 2026
The .NET 10 and Visual Studio 2026 discussion is useful context for teams thinking about tooling changes alongside framework changes.
Why Your C# Name Parser Is Wrong — And the 2025 Fix Every Developer Overlooks
The cultural-name parser article is a good reminder that “simple” input validation often breaks on real-world global data.
Building Read Models with EF Core Projections
EF Core projections for read models are a practical performance win, especially when you want to keep queries lean and focused.
CurlDotNet: Bringing curl to .NET 10 and C#
CurlDotNet looks handy if your team regularly translates API docs from curl examples into C# code.
Post-Quantum Cryptography in .NET
Post-quantum cryptography in .NET is the kind of forward-looking security update that deserves attention even if you adopt it gradually.
⚡ .NET Background Services: Slower, Hotter, Costlier
Background services deserve performance scrutiny too; this article highlights how small inefficiencies quietly become expensive at scale.
⭐ Stop Guessing! Here’s Exactly What Action Methods Do in ASP.NET Core
ASP.NET Core action methods remain foundational, and a clear refresher helps newer developers avoid controller confusion.
Spend Less Time Upgrading, More Time Coding in Visual Studio 2026
Visual Studio 2026’s upgrade improvements matter because environment drift can be a bigger productivity tax than the IDE itself.
MSSQL Extension for VS Code: Introducing Edit Data (Public Preview)
The MSSQL VS Code edit-data preview is a nice quality-of-life boost for database work, especially during debugging and seeding.
Understanding .NET Core: A Simple and Complete Guide for Beginners
The beginner .NET Core guide is straightforward onboarding material for folks still mapping the ASP.NET Core request pipeline.
Building More Secure C# .NET Applications with HashiCorp Vault
HashiCorp Vault integration is a sensible read for teams trying to stop hardcoding secrets and tighten application security.
All you need to know about the C# spread operator
The C# spread operator explainer is timely for developers catching up on newer language syntax.
Optimize GUID creation performance in .NET applications
GUID creation performance sounds niche until you’re generating lots of identifiers; then the savings are real.
The .NET Type You’ve Never Used That Can Save 40% Allocations: MemoryOwner
MemoryOwner is another allocation-saver worth a look if you work with buffers and care about throughput.
How To Write Clean Code With The Help Of Static Code Analysis in .NET 9
Static code analysis in .NET 9 is a solid practical reminder that cleaner code usually starts with automated checks.
Blazor .NET 10 Breakthroughs: Web Dev Made Surprisingly Easy
Blazor in .NET 10 gets an optimistic treatment here, and it’s worth watching if your web stack is still in flux.
Azure SQL vector indexing in public preview is the most obviously “new capability” item, especially for search-heavy and AI-adjacent apps.