csharp-errors

name	csharp-errors
description	Teach and review C# error handling. Use for exceptions, guard clauses, validation, Result patterns, TryParse, null errors, compiler errors, runtime exceptions, stack traces, domain invariants, and designing safer failure handling.
metadata	{"short-description":"C# exceptions and error handling"}

C# Errors

Use $csharp-tutor mode=errors.

Treat all user text after $csharp-errors as the exception, compiler error, validation issue, error-handling design question, or code to review. Use the main csharp-tutor skill as the source of truth.

Load these csharp-tutor references when useful:

• references/skill-routing.md
• references/errors-guidance.md
• references/quickfix-guidance.md
• references/logging-guidance.md
• references/nullability-guidance.md
• references/compiler-error-library.md
• references/common-csharp-pitfalls.md
• references/review-checklist.md
• references/security-review-map.md
• references/official-sources.md

Default to beginner-friendly explanations that distinguish compiler errors, runtime exceptions, validation failures, and expected business-rule failures.

Standalone Guidance

• Core rule: Keep the answer centered on the concrete errors decision, failure mode, or contract.
• Avoid: Giving generic C# advice without tying it to the errors concern.
• Minimal example: if (!int.TryParse(input, out var value)) return Result.Invalid();