I have tested the case by defining a single button and handling its Click event as follows:
private void RadButton_Click(object sender, RoutedEventArgs e)
this.tlv.ItemsSource = (this.Resources["MyViewModel"] as MyViewModel).RootItems;
However, it works correctly on my side. I am attaching the updated sample. Is your scenario the same or am I missing something ?
the Telerik team
Thank you for being the most amazing .NET community! Your unfailing support is what helps us charge forward!
We'd appreciate your vote for Telerik in this year's DevProConnections Awards. We are competing in mind-blowing 20 categories and every vote counts! VOTE for Telerik NOW >>