csharp-dotnet

Scope

Covers application and library code on modern .NET: the C# language, the SDK build (MSBuild, NuGet, Central Package Management), ASP.NET Core services and APIs, Blazor, .NET MAUI, the testing stack, runtime and build diagnostics, and moving a codebase across target frameworks. .NET 10 is the current LTS and the default target here; C# 14 is its language version, and .NET 11 with C# 15 is the next STS.

Not covered: reviewing a diff for general correctness and risk — use the code-review skill. Root-causing a reproducible local failure — use the debugging skill. Test-first methodology and what deserves a test at all — use the test-driven-development skill. Visual and layout design of a web UI — use the frontend-design skill. Unity C# and its engine APIs — use the unity skill; Godot's C# bindings — use the godot skill. Azure resource orchestration (Bicep, azd, ARM, Azure SDK clients) — use the azure skill. Out of scope entirely: .NET Aspire orchestration, F# and Visual Basic, database schema design, and Windows Forms/WPF beyond the upgrade checklist.