I just wanted to let you know that the internal build is live and you can download it from you account.
When you update your project to reference the new assemblies you will be able to use RadSlideView's new event SlideViewStateChanged.
You can it to understand when the filmstrip mode gets activated by using the following approach:
sender, Telerik.Windows.Controls.SlideViewStateChangedArgs e)
(e.OldState == Telerik.Windows.Controls.SlideViewState.Filmstrip)
//Filmstrip mode is deactivated
(e.NewState == Telerik.Windows.Controls.SlideViewState.Filmstrip)
//Filmstrip mode is activated
I hope this information helps. Let us know if you need further assistance.
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