Inspectopedia 2025.2 Help

Possible 'null' assignment to non-nullable entity

An expression which can have 'null' value is assigned to an entity marked with 'Value cannot be null' attribute. In particular, this can happen when passing such value to a method whose parameter is marked with 'Value cannot be null' 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.

Xaml.AssignNullToNotNullAttribute
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 | XAML | Constraints Violations

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 Xaml.AssignNullToNotNullAttribute

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