C# 14's extension member syntax now covers properties and static members, not just methods, yet a type's own member still silently wins over an identically named extension member. The author reproduces this against the .NET 10 SDK with eight tests: the build reports zero warnings and zero errors while every call site quietly switches to new logic.
A tutorial that wires .NET 10 into Pinecone, the managed vector database, using HttpClient and the REST data-plane endpoints instead of the archived C# SDK. It covers options binding, DI registration, upsert and similarity query, plus validation that keeps embeddings consistent.
Microsoft Agent Framework lets .NET developers turn a console app into an AI agent that can call tools with only a few lines of code. The article walks through creating the agent, wiring C# functions as tools, testing it locally, and moving the same code to production on Microsoft Foundry Hosted Agents.
The model's failure on the "strawberry" question isn't a counting problem: it never sees letters, only numeric pieces called tokens. Using Microsoft.ML.Tokenizers 2.0.1 and the gpt-5 tokenizer, the author measures this from C# and shows that the word alone is a single token with ID 101830, so the r's inside it stay out of reach. The piece also covers how token cost varies by language, by numbers, and by random text such as GUIDs, plus how to count tokens in .NET.
A method that returns IReadOnlyList<T> tells the caller it cannot write, but says nothing about whether the data is an independent copy, a live view or a fixed report. The article separates the declared capability from the ownership and lifetime contract, then evaluates each collection return shape against both layers.
A C# walkthrough of Gauss-Legendre quadrature that computes Legendre polynomial roots and weights at runtime instead of shipping precomputed tables. Bonnet's recurrence keeps the polynomial evaluation stable past degree 15, and Newton's method finds each root to about 1e-10 in a few iterations.
FAIRouter, an open-source C# router that picks a language model per request and validates the reply with a judge model, is now published on NuGet as FAI.Router (0.1.0, .NET 10). A few lines of code connect OpenRouter or any OpenAI-compatible endpoint, score answers, collect feedback and train the router's weights.
This article explains the difference between delegates and events in C#, the subscription boundary an event creates, and how multicast invocation behaves when a handler throws. It also covers what notification does not guarantee: completion of every subscriber, async handling and subscription lifetime. Read it to design event-based notifications with clearer contracts.
C# 15 lets you declare indexers inside extension blocks, so types you don't own can support square-bracket access. Adding Count and Slice also unlocks index-from-end, ranges, and list patterns. The feature was tested on the .NET 11 RC 1 SDK, and the article lists its gotchas: real indexers win silently, arrays and strings are excluded, and expression trees reject it.
Valve's Achievement Sets beta lets Steam games group achievements by base game, DLC and other sets. Steam refuses unlocks for DLC the account doesn't own or for archived sets, and one rejected item can fail an entire batch write. A C# developer maintaining an achievement manager explains the schema changes, the parsing code and the ownership-check fix.
In .NET 11, the runtime can suspend and resume async methods itself, so the C# compiler no longer generates a state machine for them. The feature is in preview and is opted into per project. The post shows the much smaller IL, cleaner stack traces, and what still changes when you debug.
C# Corner walks through reading CBOR data with the System.Formats.Cbor package, from a basic CborReader example to buffering partial network reads. It stresses separating incomplete input from malformed data, enforcing size limits and defining message boundaries. Useful for services that receive binary payloads from devices or APIs.