Bloom.Book.BookStorage.UpdateSupportFiles C# (CSharp) Méthode

        private void UpdateSupportFiles()
        {
            if (IsPathReadonly(_folderPath))
            {
                Logger.WriteEvent("Not updating files in folder {0} because the directory is read-only.", _folderPath);
            }
            else
            {
                Update("placeHolder.png");
                Update("basePage.css");
                Update("previewMode.css");
                Update("origami.css");
                Update("languageDisplay.css");

                foreach (var path in Directory.GetFiles(_folderPath, "*.css"))
                {
                    var file = Path.GetFileName(path);
                    //if (file.ToLower().Contains("portrait") || file.ToLower().Contains("landscape"))
                    Update(file);
                }
            }

            //by default, this comes from the collection, but the book can select one, including "null" to select the factory-supplied empty xmatter
            var nameOfXMatterPack = _dom.GetMetaValue("xMatter", _collectionSettings.XMatterPackName);
            nameOfXMatterPack = HandleRetiredXMatterPacks(_dom, nameOfXMatterPack);

            try
            {
                var helper = new XMatterHelper(_dom, nameOfXMatterPack, _fileLocator);
                Update(Path.GetFileName(helper.PathToStyleSheetForPaperAndOrientation), helper.PathToStyleSheetForPaperAndOrientation);
            }
            catch (Exception error)
            {
                ErrorMessagesHtml = WebUtility.HtmlEncode(error.Message);
            }
        }