/// <summary>
        /// This method returns the public URL of a DropBox file or folder
        /// </summary>
        /// <param name="token"></param>
        /// <param name="fsEntry"></param>
        /// <returns></returns>
        static public Uri GetPublicObjectUrl(ICloudStorageAccessToken token, ICloudFileSystemEntry fsEntry)
        {
            // check parameters
            if (fsEntry == null)
            {
                throw new SharpBox.Exceptions.SharpBoxException(AppLimit.CloudComputing.SharpBox.Exceptions.SharpBoxErrorCodes.ErrorInvalidParameters);
            }

            // get the resource path
            String resourcePath = GenericHelper.GetResourcePath(fsEntry);

            // check if it is a public dir
            if (!resourcePath.ToLower().Contains("/public/"))
            {
                throw new SharpBox.Exceptions.SharpBoxException(AppLimit.CloudComputing.SharpBox.Exceptions.SharpBoxErrorCodes.ErrorInvalidParameters);
            }

            // get accoutn inf
            DropBoxAccountInfo accInfo = GetAccountInformation(token);

            // http;//dl.dropbox.com/u/" + userid / + folder + filename
            String uri = "http://dl.dropbox.com/u/" + accInfo.UserId.ToString() + resourcePath.Replace("/Public", "");

            // go ahead
            return(new Uri(uri));
        }
        /// <summary>
        /// This method returns the account information of a dropbox account
        /// </summary>
        /// <param name="token"></param>
        /// <returns></returns>
        static public DropBoxAccountInfo GetAccountInformation(ICloudStorageAccessToken token)
        {
            // generate the dropbox service
            DropBoxStorageProviderService service = new DropBoxStorageProviderService();

            // generate a session
            IStorageProviderSession session = service.CreateSession(token, DropBoxConfiguration.GetStandardConfiguration());

            if (session == null)
            {
                return(null);
            }

            // receive acc info
            DropBoxAccountInfo accInfo = service.GetAccountInfo(session);

            // close the session
            service.CloseSession(session);

            // go ahead
            return(accInfo);
        }