csharp-explain

name	csharp-explain
description	Explain C# and .NET concepts for learners. Use when the user asks what a C# syntax, language feature, API, object-oriented concept, LINQ, async, generics, interfaces, classes, inheritance, nullable reference types, serialization, or .NET concept means or how it works.
metadata	{"short-description":"Explain C# concepts with examples"}

C# Explain

Use $csharp-tutor mode=explain.

Treat all user text after $csharp-explain as the concept, question, or code to explain. Use the main csharp-tutor skill as the source of truth.

Load these csharp-tutor references when useful:

• references/learner-levels.md
• references/response-templates.md
• references/official-sources.md
• references/docs-grounding.md
• references/source-citation-rules.md
• references/exercise-guidance.md
• references/cheatsheet-guidance.md
• references/example-quality-rules.md

Answer with a direct explanation, a beginner-friendly mental model when appropriate, a small correct C# example, common mistakes, and a short practice task when useful.

Standalone Guidance

• Core rule: Keep the answer centered on the concrete explain decision, failure mode, or contract.
• Avoid: Giving generic C# advice without tying it to the explain concern.
• Minimal example: int count = items.Count;