[Foundation] Fix nullability in NSDictionary. #24478
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This is file 42 of 47 files with nullability disabled in Foundation.
* Enabled nullable reference types.
* Made ObjectForKey return nullable TValue? since keys may not exist.
* Made TryGetValue parameter nullable with NotNullWhen(true) attribute.
* Kept IDictionary interface implementations non-nullable per .NET contract.
* Replaces 'To be added' XML comments with proper documentation.
* Verifies and improves XML comments for language, grammar, consistency and correctness.
* Adds see cref attributes for type references.
* Removes unnecessary whitespace in XML comments.
* Fixes typos ('pais' -> 'pairs').
* Updates System.Object references to use simpler 'object' syntax.
Contributes towards #17285.
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Pull request overview
This PR enables nullable reference types for NSDictionary and significantly improves its XML documentation as part of the ongoing effort to add nullability to Foundation types (issue #17285).
Key changes:
- Enabled nullable reference types throughout the file by adding
#nullable enableat the top - Made
ObjectForKeyreturnNSObject?to reflect that keys may not exist in the dictionary - Updated
TryGetValueto use[NotNullWhen(true)]attribute for better nullable semantics - Replaced placeholder "To be added" XML comments with comprehensive, accurate documentation
- Fixed typo "pais" → "pairs" in documentation
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| src/Foundation/NSDictionary.cs | Enables nullable reference types, improves TryGetValue nullability semantics with NotNullWhen attribute, replaces placeholder documentation with detailed XML comments, fixes spelling errors, and adds proper see cref attributes for type references |
| src/VideoToolbox/VTVideoEncoder.cs | Updates TryGetValue call to use explicit type parameter syntax compatible with the new generic method signature |
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rolfbjarne
changed the title
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This is file 42 of 47 files with nullability disabled in Foundation.
Contributes towards #17285.