private void btnNavigationPane_CheckChanged(object sender, RoutedEventArgs e) {
if (isOnLoad) {
} else if (e.RoutedEvent.Name == "Checked") {
TreeGrid.ColumnDefinitions[0].Width = new GridLength(200);
Utilities.SetRegistryValue("NavigationPaneEnabled", 1);
} else {
TreeGrid.ColumnDefinitions[0].Width = new GridLength(1);
Utilities.SetRegistryValue("NavigationPaneEnabled", 0);
}
}