An overview of the C# 15 features: union types, closed class hierarchies, named break and continue, extension indexers, with-arguments in collection expressions and the revised unsafe model. It shows how each one changes everyday code and where the caveats are.
.NET 11 RC2 adds Process.RunAndCaptureText, which runs an external command, drains stdout and stderr together and returns both strings with the exit code. It removes the deadlock that the classic redirect-and-ReadToEnd pattern can hit on noisy tools. Anyone who shells out to git, ffmpeg or internal CLIs will want to know the new helpers and their timeout behavior.
ServiceStack v10.4 lets typed OrmLite queries reach into complex properties such as x.Address.City or x.Lines.Any(...). The expressions are translated to the native JSON functions of SQLite, PostgreSQL, SQL Server and MySQL, so one query works across all four. This removes the need for Sql.Json() wrappers on complex properties.
MCP C# SDK 2.3.0 brings improvements to HTTP discovery, OAuth, stdio shutdown and the ordering of server tools, prompts and resources. It also includes a source-compatibility change: McpClient.ServerInfo is now nullable. Projects that read this property may see new nullable warnings or fail warnings-as-errors builds.
A practical guide to Unity native plugins on Android and iOS, arguing that the hard part is not the native calls but threading, build configuration and release stripping. It covers a single C# interface with an editor fake, marshalling callbacks to the main thread, and CI checks for both platforms.
Andrew Lock introduces CBOR, a binary serialization format positioned as a more compact alternative to JSON, and shows how to use the System.Formats.Cbor package. The post walks through writing and reading CBOR with CborWriter and CborReader and explains the conformance modes that control the output.
C# 15 adds the closed modifier, which limits derived types of a base class to the same assembly. The compiler then knows the full list of subtypes and can flag switch expressions that miss a case. This helps .NET developers catch new cases at build time instead of finding silent runtime bugs in game logic or domain rules.
Ali Hamza Ansari compares the PipeReader overload that .NET 10 adds to System.Text.Json with reading the same large JSON payload from a Stream. He measures execution time, allocated memory and GC collection counts on a file with one million records. The results matter if your high-traffic endpoints deserialize big request bodies.
ServiceStack v10.4 brings typed support to OrmLite for recursive hierarchies, named sub queries, window functions, set operations and keyset paging. These queries used to need hand-written SQL, and now they stay parameterized and composable with your existing filters and joins. The post walks through each feature with examples and the SQL they generate.
ASP.NET Core 11 adds built-in localization for validation messages and display names in Minimal APIs and Blazor. Registering AddValidation and AddLocalization, plus culture-specific resx files, is enough to return 400 responses in the caller's language. The author shows a working sample and an integration test across four cultures.
The GitHub Copilot SDK lets you keep GitHub's agent runtime while routing model inference to your own Microsoft Foundry or Azure OpenAI deployment through BYOK. The article walks through a .NET 10 console sample that configures ProviderConfig, authenticates with Microsoft Entra ID or an API key, and sends one prompt.
Nick Cosentino explains how to set up C# code intelligence in Claude Code through the csharp-lsp plugin and where that setup stops being reliable. The article separates the language server, the plugin and the workspace as three layers to verify, and it clarifies what diagnostics and symbol navigation can and cannot prove. It is a practical checklist for .NET developers using Claude Code on C# repositories.