dotnet-version-detection

Detects .NET version information from project files and provides version-specific guidance. This skill runs first before any .NET development work. All other skills depend on the detected version to adapt their guidance.

Cross-cutting skill referenced by [skill:dotnet-advisor] and virtually all specialist skills. See also [skill:dotnet-file-based-apps] for .NET 10+ file-based apps that run without a .csproj.

Scope

• Reading TFM from .csproj, Directory.Build.props, and global.json
• Multi-targeting detection and highest-TFM selection
• SDK version detection and preview feature gating
• Version-specific API availability guidance
• C# language version mapping and support lifecycle reporting

Out of scope