internal override string Execute(System.Collections.Specialized.NameValueCollection commandParameters)
        {
            int userID;

            if (!Helper.TryGetUserID(_session, out userID))
            {
                return(String.Empty);
            }

            BLClient client = null;
            List <List <AssetContentListContent> > assetContentFolders = null;

            try
            {
                client = new BLClient();

                assetContentFolders = client.GetAssetContentAll(userID);
            }
            catch (Exception exception)
            {
                return(ErrorWrapper.SendError(exception.Message));
            }
            finally
            {
                if (client != null)
                {
                    client.Dispose();
                }
            }

            return(Flatten(assetContentFolders));
        }