Handle Double Click On Application Button
The RadRibbonView class exposes the ApplicationButtonDoubleClick event, which is fired when the RibbonView's ApplicationButton is double-clicked.
<telerik:RadRibbonView x:Name="radRibbonView" ApplicationButtonDoubleClick="radRibbonView_ApplicationButtonDoubleClick">
For more information about the ApplicationButtonDoubleClick event, take a look at the Events section in the Application Menu topic.
For a full list of the exposed by the RadRibbonView events, take a look at the Events - Overview topic.