/// <summary>
        /// delete_tag
        /// </summary>
        /// <param name="request">set tag request parameter</param>
        /// <returns></returns>
        public TagDeleteResponse DeleteTag(TagDeleteRequest request)
        {
            var postStr = request.GeneratePostData(Apikey, SecretKey);

            var response = PostData(request.ServiceUrl, postStr);

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

            TagDeleteResponse result = null;

            try
            {
                result = JsonConvert.DeserializeObject <TagDeleteResponse>(response);
            }
            catch (Exception ex)
            {
                Debug.WriteLine("DeleteTag Error Response Deserialize Fail, May not valid json:" + ex.Message + " " + response);
            }
            return(result);
        }