C# 14, shipped with .NET 10, adds extension members: extension properties, static members and operators declared inside extension blocks. This goes beyond the classic this-parameter extension methods and lets APIs read more naturally. Knowing the current limits, such as no state and no indexers, matters before adopting it in production.
This post shows how to host a Microsoft Agent Framework agent over the Agent-to-Agent (A2A) protocol in ASP.NET Core and call it from a separate client as if it were local. It covers the agent card, session handling and the JSON-RPC endpoint.
This article walks through how the .NET 10 runtime's ReadOnlySpan<char>.IndexOf finds a substring using SIMD vector instructions. The author compares it with a naive loop in a BenchmarkDotNet run and explains where the speed difference comes from. It is a useful deep dive for developers who care about string search performance.
A developer's hands-on testing surfaced eight .NET MAUI accessibility problems that XAML alone does not reveal, covering screen reader names, headings, font scaling, and contrast. Each issue comes with a concrete fix or test step, which makes this a practical checklist before shipping a MAUI app.
Mehdi Mohseni argues that coding agents now write much of the code, but developers still need the judgment to spot code that looks right and is wrong. Using ASP.NET Core examples, he shows how generated code can compile, pass tests and still hide a fail-open security check or a silent misconfiguration. A practical read for anyone reviewing agent output.
Wolverine 6.51 adds the DurabilityMode.ServerlessWithOutbox mode, letting handlers running on Cloud Run, AWS Lambda or Azure Functions keep the transactional outbox without always-on background agents. An externally triggered durability pass recovers messages that failed to send, and push receivers accept broker deliveries over HTTP. It is a useful option for teams on tight serverless budgets.
NAudio 3.3.0 preview moves the meta-package to a single net9.0 target and marks Windows-only APIs with [SupportedOSPlatform] instead of a -windows TFM. The library is also fully annotated for nullable reference types. Developers targeting plain netX.0 should know the new package layout and the CA1416 warnings it can produce.
The author built xapi-dotnet, an xAPI 2.0 (IEEE 9274.1.1) library with statement models, an async client, a durable outbox and an LRS that runs inside ASP.NET Core. The write-up covers conformance testing in CI, reflection-free JSON handling for Native AOT and Unity, and the real cost of durable writes. Useful for any team sending e-learning data from .NET.
The community TypeSafe Jev .NET SDK 0.7.0 adds experimental image input and a Box question type that returns a normalized bounding box for a target in an image. The release also brings nullable usage counts, stricter request validation and zstd compression. Developers experimenting with vision requests in C# should read on.
Agent Framework can pause an agent before a sensitive tool runs, using ApprovalRequiredAIFunction, until a person approves. The author shows the approval loop in a console app and over the Responses protocol on Microsoft Foundry. On Foundry, an approved booking still ends in a failed run, a caveat every hosted approval flow should account for.
Microsoft has announced the public preview of dotnetup, a toolchain manager that installs, manages and updates .NET SDKs and runtimes in the user account on macOS and Linux. It needs no admin rights, supports side-by-side versions and respects global.json. It is a practical option for local machines and CI workers.
Aspire 13.6 moves dashboard telemetry from memory into SQLite, so logs, traces and metrics survive restarts. A run selector lets you revisit earlier runs of the same app. Default telemetry limits rise to 100,000 entries, and memory use drops in the team's benchmark.