public ascx_FolderView loadFolder(TreeNode treeNode, string path)
 {
     "Loading Folder: {0}".info(path);
     if (path.valid())
     {
         FolderView.beginUpdate();
         path = Environment.ExpandEnvironmentVariables(path);  // in case there are Environment variables like %SystemDrive%
         //"There are {0} files {0}".info(path.files().size());
         //"There are {0} folders {0}".info(path.folder.folders().size());
         var folders = path.folders().sort();
         foreach (var folder in folders)
         {
             treeNode.add_Node(folder.fileName(), folder, folder.files().size() > 0 || folder.folders().size() > 0)
             .color(Color.DarkOrange);
         }
         var files = path.files();
         treeNode.add_Nodes(files, (file) => file.fileName(), (file) => file, (file) => false, (file) => Color.DarkBlue);
         FolderView.endUpdate();
     }
     return(this);
 }