public virtual void CreateNewFile(ShellNewEntry f)
 {
     UIFilesystemHelpers.CreateFileFromDialogResultType(AddItemType.File, f, associatedInstance);
 }
 public virtual void CreateNewFolder(RoutedEventArgs e)
 {
     UIFilesystemHelpers.CreateFileFromDialogResultType(AddItemType.Folder, null, associatedInstance);
 }