dotnet-multi-targeting

What problem does it solve?

This Skill provides comprehensive guidance on targeting multiple .NET Target Framework Monikers (TFMs) and using newer C# language features with older TFMs, ensuring your libraries and applications remain compatible across diverse .NET environments.

Core Features & Use Cases

• Polyfill Strategies: Leverages PolySharp and SimonCropp/Polyfill for backporting language features and BCL APIs.
• Conditional Compilation: Guides on using #if directives for runtime behavior differences and platform-specific APIs.
• Project Configuration: Demonstrates best practices for .csproj multi-targeting, conditional package references, and TFM-specific source files.
• API Validation: Explains how to use EnablePackageValidation and the ApiCompat tool to ensure API consistency across TFMs.
• Use Case: You are developing a .NET library that needs to support .NET 8.0 and .NET 10.0. This Skill helps you use C# 14 features like required modifiers and init properties on .NET 10.0 by providing the necessary polyfills and project configurations.

Quick Start

Use the dotnet-multi-targeting skill to configure your .NET project to support both net8.0 and net10.0 TFMs using PolySharp and Polyfill.