IDISP026

Class with no virtual DisposeAsyncCore method should be sealed

Topic	Value
Id	IDISP026
Severity	Warning
Enabled	True
Category	IDisposableAnalyzers.Correctness
Code	ClassDeclarationAnalyzer

Description

Class with no virtual DisposeAsyncCore method should be sealed.

When implementing IAsyncDisposable, classes without a virtual DisposeAsyncCore method should be sealed. See https://docs.microsoft.com/en-us/dotnet/standard/garbage-collection/implementing-disposeasync.

How to fix violations

Mark classes the implement IAsyncDisposable as sealed.

Configure severity

Via ruleset file.

Configure the severity per project, for more info see MSDN.

Via #pragma directive.

#pragma warning disable IDISP026 // Class with no virtual DisposeAsyncCore method should be sealed
Code violating the rule here
#pragma warning restore IDISP026 // Class with no virtual DisposeAsyncCore method should be sealed

Or put this at the top of the file to disable all instances.

#pragma warning disable IDISP026 // Class with no virtual DisposeAsyncCore method should be sealed

Via attribute [SuppressMessage].

[System.Diagnostics.CodeAnalysis.SuppressMessage("IDisposableAnalyzers.Correctness", 
    "IDISP026:Class with no virtual DisposeAsyncCore method should be sealed", 
    Justification = "Reason...")]