dotnet-csharp-modern-patterns

C# records provide built-in value-based equality and immutability, making them ideal for data transfer objects. You can refactor existing classes to record types to achieve concise, expressive syntax for immutable data structures across .NET Target Frameworks.

Primary constructors in modern C# allow you to declare constructor parameters directly on the type declaration, providing cleaner service initialization. This feature is available in C# 12 and later, targeting .NET 8.0 and above.

Advanced pattern matching features depend on your specific .NET Target Framework Moniker (TFM). The skill provides polyfill strategies and multi-targeting guidance to help you adopt modern C# pattern matching even when targeting older framework versions.

Collection expressions in modern C# simplify list creation by providing a unified syntax for initializing collections. You can use them across various .NET TFMs, with feature availability detailed by language version from C# 12 through C# 15.

Use polyfill strategies for modern C# language features when you need to multi-target older .NET frameworks that lack native support. This approach allows you to leverage newer syntax like the `field` keyword while maintaining compatibility with earlier TFM versions.

C# 14 features, including extension blocks and the `params` collections modifier, are available for .NET 10.0. The skill details feature availability by TFM, mapping language versions from C# 12 through C# 15 to their corresponding .NET runtimes.