/// <summary>
        /// 文字类型请求
        /// </summary>
        /// <param name="requestMessage"></param>
        /// <returns></retturns>
        public  override  IResponseMessageBase OnTextRequest(RequestMessageText requestMessage)
        {
            var responseMessage = base.CreateResponseMessage<ResponseMessageText>();
            string BotMessage =await MSBot.PostMessage(requestMessage.Content);
            responseMessage.Content = BotMessage;
            return responseMessage;
        }

        public async static Task<string> PostMessage(string message)
        {
            HttpClient client;
            HttpResponseMessage response;

            bool IsReplyReceived = false;

            string ReceivedString = null;

            client = new HttpClient();
            client.BaseAddress = new Uri("https://directline.botframework.com/api/conversations/");
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            //client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("BotConnector", "uc0nyMvM0NI.cwA.wYs.B8F1M7cEBm9StsTDG8pmuOjhnxeCJd2LdvNlKVfBgro");
            // for leon
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("BotConnector", "");
            // for doudou
            //client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("BotConnector", "iCoMHD3whk8.cwA.50s.vlUvoUn7IjjRuHkSeNZQ2dOIHHTOftz07bAJRF2WJy8");


            response = await client.GetAsync("/api/tokens/");
            if (response.IsSuccessStatusCode)
            {
                var conversation = new Conversation();
                StringContent content = new StringContent(JsonConvert.SerializeObject(conversation));
                response = await client.PostAsync("/api/conversations/", content);
                //response = await client.PostAsync("/api/conversations/", null);
                if (response.IsSuccessStatusCode)
                {
                    string json = await response.Content.ReadAsStringAsync();
                    Conversation ConversationInfo = JsonConvert.DeserializeObject<Conversation>(json);
                    //Conversation ConversationInfo = response.Content.ReadAsAsync(typeof(Conversation)).Result as Conversation;
                    string conversationUrl = ConversationInfo.conversationId + "/messages/";
                    Message msg = new Message() { text = message };
                    StringContent cont = new StringContent(JsonConvert.SerializeObject(msg));
                    response = await client.PostAsync(conversationUrl, cont);
                    if (response.IsSuccessStatusCode)
                    {
                        response = await client.GetAsync(conversationUrl);
                        if (response.IsSuccessStatusCode)
                        {
                            string str = await response.Content.ReadAsStringAsync();

                            MessageSet BotMessage = JsonConvert.DeserializeObject<MessageSet>(str);
                            ReceivedString = BotMessage.messages[1].text;
                            IsReplyReceived = true;
                        }
                    }
                }

            }
            return ReceivedString;
        }