Bloom.Edit.EditingModel.OnPageSelectionChanged C# (CSharp) Method

        void OnPageSelectionChanged(object sender, EventArgs e)
        {
            Logger.WriteMinorEvent("changing page selection");
            Analytics.Track("Select Page");//not "edit page" because at the moment we don't have the capability of detecting that.
            // Trace memory usage in case it may be useful
            MemoryManagement.CheckMemory(false, "switched page in edit", true);

            if (_view != null)
            {
                if (_previouslySelectedPage != null && _domForCurrentPage != null)
                {
                    _view.UpdateThumbnailAsync(_previouslySelectedPage);
                }
                _previouslySelectedPage = _pageSelection.CurrentSelection;

                // BL-2339: remember last edited page
                if (_previouslySelectedPage != null)
                {
                    var idx = _previouslySelectedPage.GetIndex();
                    if (idx > -1)
                        _previouslySelectedPage.Book.UserPrefs.MostRecentPage = idx;
                }

                _pageSelection.CurrentSelection.Book.BringPageUpToDate(_pageSelection.CurrentSelection.GetDivNodeForThisPage());
                _view.UpdateSingleDisplayedPage(_pageSelection.CurrentSelection);
                _duplicatePageCommand.Enabled = !_pageSelection.CurrentSelection.Required;
                _deletePageCommand.Enabled = !_pageSelection.CurrentSelection.Required;
            }

            GC.Collect();//i put this in while looking for memory leaks, feel free to remove it.
        }