# TreeListControlBase.NodeCheckStateChanged event

Occurs when a node's check state is changed.

```csharp
public event EventHandler<TreeListNodeEventArgs>? NodeCheckStateChanged;
```

## See Also

* class [TreeListNodeEventArgs](../TreeListNodeEventArgs.md)
* class [TreeListControlBase](../TreeListControlBase.md)
* namespace [Eremex.AvaloniaUI.Controls.TreeList](../index.md)

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