Editor's note
I kept this one nicely mixed on purpose: language evolution, web pipeline fundamentals, architecture, and a few practical performance lessons. The union types preview is the obvious attention-grabber, but I also think the zero-copy C# piece is worth your time if you care about low-level efficiency. On the application side, the Clean Architecture walkthrough and the idempotency article both stand out for teams building real services, not toy samples.
Middleware, C# changes, and architecture
Jasen Fici
June 01, 2026
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Today's Articles
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Jasen's take on today's picks
Building AutoStack.Identity: A Zero-Dependency .NET 10 Library for SAML 2.0, JWT, and XML Signing
Interesting identity-library write-up, especially the zero-dependency angle. Worth a look if you want SAML and JWT support without dragging in a large stack.
Understanding Middleware in .NET
A solid refresher on how requests actually move through the ASP.NET Core pipeline. Good entry-level grounding that still matters in production apps.
From Structs to Strongly Typed Zero-Copy Views in C#
This is the kind of lower-level C# article I like seeing: concrete language mechanics tied to memory movement and data modeling.
The Hidden Cost of ToList() in .NET APIs
A useful reminder that convenience materialization has a cost. Teams chasing API latency should audit these habits.
Union Types Are Finally Coming to C#
If union types land as described, this will be one of the more meaningful ergonomics upgrades for everyday C# modeling.
Add a Live Observability Dashboard to Your ASP.NET
Lightweight observability is a compelling pitch, especially for smaller services that need visibility without a full platform investment.
Idempotency in .NET Backend Systems: How to Prevent Duplicate Processing
Idempotency remains one of those unglamorous backend topics that saves real pain. Practical and very applicable.
️ Modernizing .NET — Part 26: Implementing Rate Limiting Middleware in ASP.NET Core
Rate limiting is now table stakes for public-facing APIs. Nice fit for anyone modernizing older ASP.NET services.
Why Blazor UI Sometimes Does Not Refresh After Data Update
A familiar Blazor gotcha, and one that still trips people up. Helpful if you’ve seen state update confusion in components.
Implementing Clean Architecture in .NET 10 - Step-by-Step Guide
Beginner-friendly, but still useful as a current reference for structuring a .NET 10 application with EF Core and Aspire.
The Most Underrated LINQ Feature in .NET: ToLookup()
ToLookup deserves more use than it gets. Handy article for developers who reach for GroupBy when they really need indexed grouping.
Architecting for Zero Trust & Fiscal Sanity: Securing and Caching .NET 8 AI Agents on AWS
Security, caching, and AI agents in one piece is a timely combination. The cost-control angle makes it more than just another AI post.
Microsoft is tightening restrictions on the use of unsafe code in C#
Worth watching because unsafe-code policy changes can ripple into performance-oriented libraries and niche interop scenarios.
Silly sorting algorithms in C#
Not every article has to be serious. Sometimes silly algorithms are just a fun way to revisit fundamentals and compare implementations.