public static void ReassignItems(object parentId, Guid fromUserId, Guid toUserId, IFolderDao folderDao, IFileDao fileDao)
{
var fileIds = fileDao.GetFiles(parentId, new OrderBy(SortedByType.AZ, true), FilterType.ByUser, false, fromUserId, null, true, true)
.Where(file => file.CreateBy == fromUserId).Select(file => file.ID);
fileDao.ReassignFiles(fileIds.ToArray(), toUserId);
var folderIds = folderDao.GetFolders(parentId, new OrderBy(SortedByType.AZ, true), FilterType.ByUser, false, fromUserId, null, true)
.Where(folder => folder.CreateBy == fromUserId).Select(folder => folder.ID);
folderDao.ReassignFolders(folderIds.ToArray(), toUserId);
}