void FrameOnTemplateChanged(object sender, EventArgs eventArgs) { if (Window.Template != null) { var navigationActionContainer = Window.Template.GetContainers().OfType<NavigationActionContainer>().FirstOrDefault(); if (navigationActionContainer != null && navigationActionContainer.NavigationControl is ASPxTreeList) { var treeListOptionsModelSynchronizer = new TreeListOptionsModelSynchronizer<IModelRootNavigationItems>(navigationActionContainer.NavigationControl, ((IModelApplicationNavigationItems)Application.Model).NavigationItems); treeListOptionsModelSynchronizer.ApplyModel(); } } }