How does it handle asynchronous code?

It enforces async-first logic, mandatory CancellationToken passing, and the use of ConfigureAwait(false) in library code to prevent common deadlocks.

Does it include project setup templates?

Yes, it provides standardized Directory.Build.props configurations to unify compiler settings, enable analyzers, and set strict analysis levels across your solution.

Why use Records over standard Classes?

The skill recommends records for DTOs and value types to leverage built-in immutability, value-based equality, and more concise syntax which reduces boilerplate.

Can it help with null safety?

Yes, it promotes project-wide Nullable Reference Types and treats warnings as errors to ensure higher runtime reliability and fewer null reference exceptions.

Does this skill support older .NET versions?

While focused on .NET 8+ and C# 12, many patterns apply to .NET 6 and 7, though specific features like primary constructors and records are optimized for the newest versions.

Modern C# & .NET 8

Name: Modern C# & .NET 8
Author: phrazzld

byphrazzld

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API Development

Applies modern .NET 8+ patterns, async-first logic, and clean C# coding standards to your codebase.

This skill equips Claude with the expertise needed for high-performance .NET 8+ development, focusing on modern language features like records for immutability and advanced pattern matching. It enforces best practices such as non-blocking async/await patterns with proper cancellation token handling, nullable reference type safety, and standardized project configurations. It is particularly useful for developers looking to modernize legacy C# code, build robust library components, or ensure strict adherence to the latest .NET architectural standards.

Key Features

012 GitHub stars

02Enforces Nullable Reference Types and strict compiler warnings

03Utilizes C# Records and IReadOnlyList for immutable data structures

04Automates .NET 8+ project configuration via Directory.Build.props

05Implements async-first patterns with ConfigureAwait(false) for library code

06Optimizes logic with advanced switch expressions and pattern matching

Use Cases

01Enforcing clean architecture using immutability and records for DTOs

02Designing high-performance, thread-safe library components

03Modernizing a legacy .NET codebase to .NET 8+ standards

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add phrazzld/claude-config csharp-modern

For use in Claude.ai and ChatGPT

Download Skill