吉特日化MES & HttpClient基础连接已经关闭: 连接被意外关闭

　　　　在吉特日化MES调用某公司AGV平台下发任务的时候，使用HttpClient 进行POST请求，出现如下异常： HttpClient基础连接已经关闭: 连接被意外关闭  ， 之前已经使用HTTPClient做过大量的三方请求均为发现此问题

public string Execute(string ApiName, JObject parameters)
        {
            string result = string.Empty;
            try
            {
                string BaseUrl = this.BaseUrl;
                string ApiUrl = string.Format("{0}{1}", BaseUrl, ApiName);
                HttpContent httpContent = new StringContent(parameters.ToString(), Encoding.UTF8, "text/json");
                httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
                HttpClient httpClient = new HttpClient();

                string responseJson = httpClient.PostAsync(ApiUrl, httpContent).Result.Content.ReadAsStringAsync().Result;
                return responseJson;
            }
            catch (Exception e)
            {
                DataResult dataResult = new DataResult() { Code = (int)EResponseCode.Exception, Message = e.Message };
                result = JsonHelper.SerializeObject(dataResult);
            }
            return result;
        }

　　　　通过如下方式解决，在配置文件中新增如下配置：

<system.net>
        <settings>
            <servicePointManager expect100Continue="false" />
        </settings>
</system.net>