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Hi, Neelamegan,
The Following code snippet demonstrates how to collapse the pages:
foreach (RadPageViewNavigationViewItem item in this.radNavigationView1.NavigationViewElement.Items) { item.IsExpanded = false; }
If you want to leave at least one RadPageViewNavigationViewItem expanded, do not set its IsExpanded property to false.
I hope this information helps. If you need any further assistance please don't hesitate to contact me.
Regards, Dess | Tech Support Engineer, Principal Progress Telerik
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