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Declaration nullability inferred (type member is inferred to be not null)

Type member is inferred always not to be null: consider annotating it with [NotNull] or [ItemNotNull] attribute

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.

AnnotateNotNullTypeMember
Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | C# | Common Practices and Code Improvements

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 AnnotateNotNullTypeMember

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
Declaration nullability inferred (parameter is inferred to be nullable)Declaration nullability inferred (type member is inferred to be nullable)