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Add NonAsyncDisposableTypeAttribute for await using#1154

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meziantou merged 4 commits into
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meziantou/await-using-attribute
May 12, 2026
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Add NonAsyncDisposableTypeAttribute for await using#1154
meziantou merged 4 commits into
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meziantou/await-using-attribute

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@meziantou meziantou commented May 12, 2026

NonAwaitableTypeAttribute was suppressing both await and await using recommendations, which made it impossible to opt out of only await using guidance. This change separates those concerns so projects can configure each behavior independently.

What changed

  • Added NonAsyncDisposableTypeAttribute in Meziantou.Analyzer.Annotations for await using suppression.
  • Updated MA0042/MA0045 await-using analysis to honor only NonAsyncDisposableTypeAttribute.
  • Kept NonAwaitableTypeAttribute for awaitability checks (await) only.
  • Updated analyzer internals to detect both attributes separately.
  • Updated tests in async and non-async MA0042 suites to lock the new behavior.
  • Updated documentation for MA0042, MA0045, and annotations README.
  • Bumped Meziantou.Analyzer.Annotations version to 1.5.0.

Notes for reviewers

This intentionally changes behavior: existing projects that used NonAwaitableTypeAttribute to suppress await using diagnostics now need to use NonAsyncDisposableTypeAttribute.

Fix #1152

meziantou and others added 4 commits May 12, 2026 16:18
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@meziantou meziantou merged commit bdc4841 into main May 12, 2026
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@meziantou meziantou deleted the meziantou/await-using-attribute branch May 12, 2026 20:41
This was referenced May 12, 2026
IhateTrains pushed a commit to ParadoxGameConverters/ImperatorToCK3 that referenced this pull request May 13, 2026
Updated
[Meziantou.Analyzer](https://github.com/meziantou/Meziantou.Analyzer)
from 3.0.79 to 3.0.84.

<details>
<summary>Release notes</summary>

_Sourced from [Meziantou.Analyzer's
releases](https://github.com/meziantou/Meziantou.Analyzer/releases)._

## 3.0.84

NuGet package:
<https://www.nuget.org/packages/Meziantou.Analyzer/3.0.84>

## What's Changed
* Ignore `[Experimental]` overloads in MA0040 cancellation-token
matching by @​Copilot in
meziantou/Meziantou.Analyzer#1157


**Full Changelog**:
meziantou/Meziantou.Analyzer@3.0.83...3.0.84

## 3.0.83

NuGet package:
<https://www.nuget.org/packages/Meziantou.Analyzer/3.0.83>

## What's Changed
* Add NonAsyncDisposableTypeAttribute for await using by @​meziantou in
meziantou/Meziantou.Analyzer#1154


**Full Changelog**:
meziantou/Meziantou.Analyzer@3.0.82...3.0.83

## 3.0.82

NuGet package:
<https://www.nuget.org/packages/Meziantou.Analyzer/3.0.82>

## What's Changed
* Add NonAwaitableTypeAttribute for MA0042/MA0045 by @​meziantou in
meziantou/Meziantou.Analyzer#1153


**Full Changelog**:
meziantou/Meziantou.Analyzer@3.0.81...3.0.82

## 3.0.81

NuGet package:
<https://www.nuget.org/packages/Meziantou.Analyzer/3.0.81>

## What's Changed
* Improve annotations documentation and rule references by @​meziantou
in meziantou/Meziantou.Analyzer#1151


**Full Changelog**:
meziantou/Meziantou.Analyzer@3.0.80...3.0.81

## 3.0.80

NuGet package:
<https://www.nuget.org/packages/Meziantou.Analyzer/3.0.80>

**Full Changelog**:
meziantou/Meziantou.Analyzer@3.0.79...3.0.80

Commits viewable in [compare
view](meziantou/Meziantou.Analyzer@3.0.79...3.0.84).
</details>

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ExcludeFromBlockingCallAnalysisAttribute not working as expected

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