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This repository was archived by the owner on Nov 12, 2026. It is now read-only.
CA1822 false positive for C#14 extension method #7646
Description
Creat a new project and target .NET 10 etc.
<Project>
<PropertyGroup>
<Nullable>enable</Nullable>
<LangVersion>preview</LangVersion>
<TargetFramework>net10.0</TargetFramework>
<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
<EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
<AnalysisMode>All</AnalysisMode>
<CodeAnalysisTreatWarningsAsErrors>true</CodeAnalysisTreatWarningsAsErrors>
</PropertyGroup>
</Project>VS incorrectly suggests that the method below can be static. It cannot.
internal static class StringExtensions
{
extension(string instance)
{
public bool L33t() => instance.Length == 1338;
}
}
Relates to extensions (test plan dotnet/roslyn#76130)
Reacted by Frulfump
Activity
CyrusNajmabadi commentedon Jul 24, 2025
Hitting this here: dotnet/roslyn#79550
jjonescz commentedon Jul 25, 2025
Fixed by #7739.
Frulfump commentedon Jul 25, 2025
Which release will include the fix?
jjonescz commentedon Jul 25, 2025
If I understand correctly, these analyzers ship in the SDK, so that would be rc.1 probably. Or you can maybe install this manually? https://dev.azure.com/dnceng/public/_artifacts/feed/dotnet10/NuGet/Microsoft.CodeAnalysis.NetAnalyzers/overview/10.0.0-preview.25375.1