public override void Invoke(AWSCredentials creds, RegionEndpoint region, int maxItems)
        {
            AmazonSimpleEmailServiceV2Config config = new AmazonSimpleEmailServiceV2Config();

            config.RegionEndpoint = region;
            ConfigureClient(config);
            AmazonSimpleEmailServiceV2Client client = new AmazonSimpleEmailServiceV2Client(creds, config);

            ListEmailTemplatesResponse resp = new ListEmailTemplatesResponse();

            do
            {
                ListEmailTemplatesRequest req = new ListEmailTemplatesRequest
                {
                    NextToken = resp.NextToken
                    ,
                    PageSize = maxItems
                };

                resp = client.ListEmailTemplates(req);
                CheckError(resp.HttpStatusCode, "200");

                foreach (var obj in resp.TemplatesMetadata)
                {
                    AddObject(obj);
                }
            }while (!string.IsNullOrEmpty(resp.NextToken));
        }
        /// <summary>
        /// 获取当前邮件模板列表
        /// </summary>
        /// <param name="req"><see cref="ListEmailTemplatesRequest"/></param>
        /// <returns><see cref="ListEmailTemplatesResponse"/></returns>
        public ListEmailTemplatesResponse ListEmailTemplatesSync(ListEmailTemplatesRequest req)
        {
            JsonResponseModel <ListEmailTemplatesResponse> rsp = null;

            try
            {
                var strResp = this.InternalRequestSync(req, "ListEmailTemplates");
                rsp = JsonConvert.DeserializeObject <JsonResponseModel <ListEmailTemplatesResponse> >(strResp);
            }
            catch (JsonSerializationException e)
            {
                throw new TencentCloudSDKException(e.Message);
            }
            return(rsp.Response);
        }