Optimizes .NET projects for multiple target frameworks using polyfills and conditional compilation strategies.
The .NET Multi-Targeting skill provides a comprehensive framework for developers building libraries or applications that must support multiple Target Framework Monikers (TFMs). It advocates for a polyfill-first approach, utilizing tools like PolySharp and SimonCropp/Polyfill to enable modern C# language features (like required members or init properties) on older runtimes without adding overhead. By providing clear guidance on when to use source-generated polyfills versus conditional compilation (#if blocks), this skill helps maintain clean, performant, and cross-compatible codebases across the entire .NET ecosystem.
主要功能
01API compatibility validation using EnablePackageValidation and ApiCompat
02TFM-specific .csproj configuration patterns and source file management
03Strategic decision matrix for polyfills vs. conditional compilation
04SimonCropp/Polyfill implementation for modern BCL API support on older TFMs
05PolySharp integration for compiler-synthesized language feature backporting
060 GitHub stars
使用场景
01Optimizing performance-critical code paths with TFM-specific hardware acceleration fallbacks
02Maintaining a single NuGet package that supports both legacy .NET Standard 2.0 and modern .NET 8/9+
03Using modern C# 12/13 syntax in projects constrained to older runtime environments
