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RadCollapsiblePanelElementExpanding Event
Occurs when the control is about to be expanded. Cancelable.

Namespace: Telerik.WinControls.UI
Assembly: Telerik.WinControls.UI (in Telerik.WinControls.UI.dll) Version: 2018.3.911.40 (2018.3.911.40)
Syntax
public event CancelEventHandler Expanding

Value

Type: System.ComponentModelCancelEventHandler
See Also