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RoslynAnalyzers Provide correct 'enum' argument to 'Enum.HasFlag'

'Enum.HasFlag' method expects the 'enum' argument to be of the same 'enum' type as the instance on which the method is invoked and that this 'enum' is marked with 'System.FlagsAttribute'. If these are different 'enum' types, an unhandled exception will be thrown at runtime. If the 'enum' type is not marked with 'System.FlagsAttribute' the call will always return 'false' at runtime.

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

CA2248
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Settings or Preferences | Editor | Inspections | C# | Roslyn Analyzers

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection CA2248

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

Inspection Details

By default bundled with:

JetBrains Rider 2025.2, Qodana for .NET 2025.2,

Last modified: 18 September 2025