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ExpandableHeaderedItemsControlPreviewCollapsed Event
Occurs when the content will be Collapsed. If the event handler set True for the Handled property then the content will not collapse.

Namespace: Telerik.Windows.Controls.Timeline
Assembly: Telerik.Windows.Controls.DataVisualization (in Telerik.Windows.Controls.DataVisualization.dll) Version: 2017.3.1018.40 (2017.3.1018.40)
Syntax
public event RadRoutedEventHandler PreviewCollapsed

Value

Type: Telerik.WindowsRadRoutedEventHandler
See Also