BetterExplorer.FolderSizeWindow.bgw_DoWork C# (CSharp) Метод

        private void bgw_DoWork(object sender, DoWorkEventArgs e)
        {
            //FSI = FolderSizeInfoClass.ConstructData(e.Argument.ToString());

            //List<FolderSizeInfoClass> FolderInfoSize = new List<FolderSizeInfoClass>();
            DirectoryInfo data = new DirectoryInfo(e.Argument.ToString());
            int i = 0;
            DirectoryInfo[] diri = data.GetDirectories();
            //GetAllDirRec(ShellObject.FromParsingName(data.FullName));

            Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Normal,
                             (Action)(() =>
                             {
                                 progressBar1.Maximum = diri.Count();
                             }));

            Parallel.ForEach(diri, (item, state) =>
            {
                if ((sender as BackgroundWorker).CancellationPending)
                {
                    state.Break();
                }
                FolderSizeInfoClass fsi = new FolderSizeInfoClass();
                fsi.FolderSizeLoc = item.Name;
                shol.Clear();
                long retsize = 0;
                int ii = 0;
                int iff = 0;

                try
                {
                    retsize = RecurseDirectory(item.FullName, -1, out ii, out iff);
                }
                catch (Exception)
                {
                }
                fsi.FSize = retsize;
                FSI.Add(fsi);

                (sender as BackgroundWorker).ReportProgress(i++);
            });
            shol.Clear();
            GC.Collect();
            GC.WaitForPendingFinalizers();
            if (Environment.OSVersion.Platform == PlatformID.Win32NT)
            {
              BExplorer.Shell.Interop.Shell32.SetProcessWorkingSetSize(System.Diagnostics.Process.GetCurrentProcess().Handle, -1, -1);
            }
        }