Microsoft.Windows.Controls.Ribbon.RibbonGallery.AddCurrentItemChangedListener C# (CSharp) Method

        private void AddCurrentItemChangedListener()
        {
            Debug.Assert(IsSynchronizedWithCurrentItemInternal, "We should add currency change listeners only when IsSynchronizedWithCurrentItemInternal is true");

            CollectionView = Items;
            SourceCollectionView = RibbonGallery.GetSourceCollectionView(this);

            if (SourceCollectionView == CollectionView.SourceCollection)
            {
                // We need to track the SourceCollectionView only if it
                // is distinct from the immediate CollectionView
                SourceCollectionView = null;
            }

            // Listen for currency changes on the immediate CollectionView for the Gallery
            CurrentChangedEventManager.AddListener(CollectionView, this);

            // Listen for currency changes on the Source CollectionView of the Gallery
            if (SourceCollectionView != null)
            {
                CurrentChangedEventManager.AddListener(SourceCollectionView, this);
            }
        }