Bloom.CollectionTab.LibraryListView.AllBookButtons C# (CSharp) Method

        private IEnumerable<Button> AllBookButtons()
        {
            foreach(var btn in _primaryCollectionFlow.Controls.OfType<Button>())
            {
                yield return btn;
            }

            foreach (var btn in _sourceBooksFlow.Controls.OfType<Button>())
            {
                yield return btn;
            }
        }