Is this work/support by lattes version?
<telerik:RadTreeView telerik:AnimationManager.IsAnimationEnabled="False"/>
RadControls for Silverlight. Article name: IsAnimationEnabled Attached Property | RadControls for Silverlight Documentation
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Article: http://www.telerik.com/help/silverlight/p_telerik_windows_controls_animation_animationmanager_isanimationenabled.html
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