Add new C# 14 diagnostics for interface implementations, and consolidate existing interface implementation diagnostics #49871
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Create shell, TOC, and placeholder for error consolidation related to interface implementations.
BillWagner
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BillWagner
November 12, 2025 21:20
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Pull Request Overview
This PR consolidates interface implementation error documentation by creating a single comprehensive article that covers 26 compiler errors and warnings related to interface member implementation. The new documentation provides organized guidance on resolving common interface implementation issues.
Key Changes
- Creates a new consolidated article
interface-implementation-errors.mdcovering 26 interface-related diagnostics organized into 8 thematic sections - Removes 18 individual error documentation files and redirects them to the new consolidated article
- Adds the new consolidated article to the TOC with appropriate display names and error code references
- Updates cross-references to point to the new consolidated documentation
Reviewed Changes
Copilot reviewed 25 out of 25 changed files in this pull request and generated 23 comments.
Show a summary per file
| File | Description |
|---|---|
| docs/csharp/language-reference/compiler-messages/interface-implementation-errors.md | New consolidated documentation covering interface implementation errors organized by theme (declaration, return types, implementations, matching, constraints, visibility, accessors, ambiguity, and special restrictions) |
| docs/csharp/misc/sorry-we-don-t-have-specifics-on-this-csharp-error.md | Removes f1_keywords for consolidated errors (CS0630, CS8705, CS8711, CS8854, CS9333, CS9334) |
| docs/csharp/language-reference/toc.yml | Adds new interface implementation section to TOC and removes individual error entries |
| docs/csharp/programming-guide/interfaces/explicit-interface-implementation.md | Updates CS0106 link to point to consolidated documentation |
| .openpublishing.redirection.csharp.json | Adds 19 redirect entries for consolidated error pages |
| .github/prompts/error-consolidation.md | Updates prompt template references to interface implementation errors |
| 18 individual error files (cs0071.md, cs0106.md, cs0277.md, etc.) | Deleted and consolidated into interface-implementation-errors.md |
meaghanlewis
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Nov 12, 2025
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Contributes to #49292
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