Individual skill

type-design-performance

Design .NET types for performance. Seal classes, use readonly structs, prefer static pure functions, avoid premature enumeration, and choose the right collection types.

skills/csharp-type-design-performance/SKILL.md

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# Type Design for Performance

## When to Use This Skill

Use this skill when:
- Designing new types and APIs
- Reviewing code for performance issues
- Choosing between class, struct, and record
- Working with collections and enumerables

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## Core Principles