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.NET 9 Articles, Tutorials & News

.NET 9 articles, tutorials, and news from the DotNetNews archive.

370 articles Updated

.NET 9 work shows up across many DotNetNews issues because teams keep hitting the same implementation questions. .NET 9 is a recurring focus for C# and .NET developers working in the Microsoft ecosystem.

Recurring subtopics in recent issues include .NET 9 features, ASP.NET Core .NET 9, asp.net, and clean. When a subtopic never appears in the archive titles or excerpts, it is left out of this introduction.

Expect publisher tutorials, release notes, architecture write-ups, and field notes linked from DotNetNews issues. Start here is a short editorial shortlist for .NET 9; the archive list is chronological and larger. Secondary angles such as .NET 9 and .NET 9 tutorials appear when the archive actually covered them. Cross-links to .NET 10 and .NET 8 help when the problem spans more than one tag.

Each card points at the original publisher URL and the DotNetNews issue that carried it, so you can read the article in context or jump straight to the source.

Start here

Editor picks for .NET 9

  1. The Power of a Single Exclamation Mark: A Memory Cache Tale in .NET 9

    medium.com Issue #503

    Covers the Power of a Single Exclamation Mark: A Memory Cache Tale in .NET 9.

    Read article Issue #503

  2. 30 LINQ Interview Questions That Actually Get Asked in 2026

    codewithmukesh.com Issue #486

    Helpful refresher on LINQ topics that actually surface in interviews and code reviews.

    Read article Issue #486

  3. Why I Switched from Swagger UI to Scalar in .NET

    serkanozbeykurucu.medium.com Issue #482

    Worth a look if you’re revisiting API docs tooling after the template changes in newer .NET versions.

    Read article Issue #482

  4. Securing .net 9 Application Using JWt Refresh Token signup , login

    c-sharpcorner.com Issue #475

    JWT refresh token walkthroughs remain evergreen, especially for teams building their own auth flows in newer .NET versions.

    Read article Issue #475

  5. Working with Span, Memory, and ref structs in High-Performance Apps using .NET 9

    c-sharpcorner.com Issue #456

    A practical refresher on the allocation-free toolbox in .NET 9, with the right focus on GC pressure and when stack-backed types actually help.

    Read article Issue #456

  6. Microsoft.Extensions.AI: The .NET Feature That’s Quietly Killing Boilerplate

    medium.com Issue #398

    Microsoft.Extensions.AI is the quiet productivity win here: less glue code when adding LLM features to .NET 9 apps.

    Read article Issue #398

  7. Solving the Distributed Cache Invalidation Problem with Redis and HybridCache

    milanjovanovic.tech Issue #375

    A real-world look at cache consistency across nodes; this is the kind of problem that shows up in production, not slides.

    Read article Issue #375

  8. Using sortable UUID / GUIDs in Entity Framework

    steven-giesel.com Issue #338

    .NET 9 introduced Guid.CreateVersion7() / Guid.CreateVersion7(DateTimeOffset) methods to create sortable UUIDs / GUIDs based on the time of their creation.

    Read article Issue #338

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