protected override void OnNavigatedTo(NavigationEventArgs e)
 {
     /// SourceGroupCollection will setup device watcher to monitor
     /// SourceGroup devices enabled or disabled from the system.
     _groupCollection          = new SourceGroupCollection(this.Dispatcher);
     GroupComboBox.ItemsSource = _groupCollection.FrameSourceGroups;
 }
 protected override void OnNavigatedTo(NavigationEventArgs e)
 {
     /// SourceGroupCollection will setup device watcher to monitor
     /// SourceGroup devices enabled or disabled from the system.
     _groupCollection = new SourceGroupCollection(this.Dispatcher);
     GroupComboBox.ItemsSource = _groupCollection.FrameSourceGroups;
 }