Editor's note
I pulled together another deliberately mixed issue, from practical performance work to architecture thinking. The file I/O benchmark piece and the passkeys amr claim article both solve real-world problems teams hit in production. I also liked the EF Core configuration post and the discussion about context as the bottleneck, because they get at how .NET systems stay understandable as they grow.
File I/O, passkeys, and source generators
Jasen Fici
January 16, 2026
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Today's Articles
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Jasen's take on today's picks
The Right Way to Hire a Dedicated .NET Developer Without Costly Mistakes
Hiring advice always sounds simple until you have to live with the consequences, and this piece focuses on the mistakes teams make when bringing in
File I/O Performance: Picking the Fastest Weapon in Your Arsenal
A benchmark-driven look at file I/O choices in .NET 10 that helps you pick the right approach instead of guessing from folklore.
Set the amr claim when using passkeys authentication in ASP.NET Core
A useful ASP.NET Core identity detail for passkeys users: getting the amr claim right matters for downstream authentication decisions.
Stop Writing Boilerplate: How C# Source Generators Are Saving MVVM
Source generators keep paying dividends, and this MVVM-focused post shows how much boilerplate they can erase.
Implementing the Result Pattern in .NET: A Complete Guide
A practical guide to the Result pattern for teams that want clearer failure handling without scattering exceptions everywhere.
C# 14 in .NET 10: language features that actually matter in production
This C# 14 overview is about production value, not syntax trivia, which makes it worth a close read.
The Cross-Cutting Concern Fallacy in .NET Architecture: Is Middleware a Solution or a Trap?
Middleware is not a universal answer for cross-cutting concerns, and this architecture post argues that tradeoff clearly.
Context Is the Bottleneck in Software Development
A thoughtful reminder that context, not typing speed, is often the real limit on software delivery.
The Better Way to Configure Entity Framework Core
A cleaner take on configuring EF Core that should resonate with developers who want control and predictable startup behavior.
ASP.NET Community Standup - What's next for Orleans?
The Orleans standup should be useful if you track the runtime ecosystem and want to hear what is next from the platform team.
Mastering Business Logic in .NET: A Deep Dive into the Specification Pattern
Specification pattern enthusiasts will appreciate the focus on keeping business rules coherent instead of scattered.
This multi-tenant observability piece points at a real operational pain point and the complexity that comes with it.