C#

private void bgwInit_DoWork(object sender, DoWorkEventArgs e)
       {
           //set vars
           Files = 0;
           Size = 0;
           //
           string dir = (string)e.Argument;
           List<ListViewItem> results = new List<ListViewItem>();
           string[] DirectoryArray = System.IO.Directory.GetDirectories("C:\\Windows");
           DateTime lastReport = DateTime.Now;
           if (DirectoryArray.Length != 0)
           {
               foreach (string D in DirectoryArray)
               {
                   System.IO.DirectoryInfo WDDirInfo = new System.IO.DirectoryInfo(D);
                   try
                   {
                       //for the sub dirs
                       System.IO.FileInfo[] WDFileInfo = WDDirInfo.GetFiles("*.*", System.IO.SearchOption.AllDirectories);
                       foreach (System.IO.FileInfo FI in WDFileInfo)
                       {
                           ListViewItem itmLog = new ListViewItem();
                           itmLog.Text = FI.FullName.ToString();
                           itmLog.UseItemStyleForSubItems = true;
                           itmLog.SubItems.Add("Veilig");
                           itmLog.ForeColor = Color.Green;
                           itmLog.EnsureVisible();
                           results.Add(itmLog);
                           string path = FI.FullName.Remove(0, 3);
                           Files = (Files + 1);
                           Size = (Size + FI.Length);
                       }

                   }
                   catch (Exception ex)
                   {

                   }
                   //end of root
                   // Report back when at least 25 milliseconds have expired since last time
                   if ((DateTime.Now - lastReport).TotalMilliseconds >= 25 || results.Count > 30)
                   {
                       this.bgwInit.ReportProgress(0, results);
                       results = new List<ListViewItem>();
                       lastReport = DateTime.Now;
                   }
               }
           }
           //for the root
           try
           {
               System.IO.DirectoryInfo WDRootDir = new System.IO.DirectoryInfo("C:\\Windows");
               System.IO.FileInfo[] WDRootFileInfo = WDRootDir.GetFiles("*.*", System.IO.SearchOption.TopDirectoryOnly);
               foreach (System.IO.FileInfo FI in WDRootFileInfo)
               {
                   ListViewItem itmLog = new ListViewItem();
                   itmLog.Text = FI.FullName.ToString();
                   itmLog.UseItemStyleForSubItems = true;
                   itmLog.SubItems.Add("Veilig");
                   itmLog.ForeColor = Color.Green;
                   itmLog.EnsureVisible();
                   results.Add(itmLog);
                   string path = FI.FullName.Remove(0, 3);
                   Files = (Files + 1);
                   Size = (Size + FI.Length);
               }
           }
           catch (Exception ex)
           {

           }
           // Report back when at least 25 milliseconds have expired since last time
           if ((DateTime.Now - lastReport).TotalMilliseconds >= 25 || results.Count > 30)
           {
               this.bgwInit.ReportProgress(0, results);
               results = new List<ListViewItem>();
               lastReport = DateTime.Now;
           }
           //report progress
           this.bgwInit.ReportProgress(50, results);
           //end of void
       }

       private void bgwInit_ProgressChanged(object sender, ProgressChangedEventArgs e)
       {
           //declare listviewitem
           //file count (may be need to redesigned)
           List<ListViewItem> items = e.UserState as List<ListViewItem>;
           //start log update
           this.lstFiles.BeginUpdate();
           //for eacht log item
           foreach (ListViewItem item in items)
           {
               //add log item to log
               this.lstFiles.Items.Add(item);
               //increase progressbar value +1
           }
           //end log update
           this.lblFilesScanned.Text = this.lstFiles.Items.Count.ToString();
           this.lstFiles.EndUpdate();
           //end of void
       }