public string[] GetPdfUrlsWithinDirectory(ContentFolder parentFolder) { if (parentFolder == null) { return(new string[0]); } try { var pdfFiles = _contentRepository .GetChildren <PdfFile>( GetFolderReference(parentFolder)); return(pdfFiles.Select(pdfFile => _linkResolver.GetFriendlyUrl(pdfFile.ContentLink)).ToArray()); } catch (Exception e) { Log.Error($"Could not retrieve Pdf file Urls from {parentFolder.RouteSegment}", e); } return(new string[0]); }