钉钉机

 string url = "https://oapi.dingtalk.com/robot/send?access_token=847bc045c802beaba749aec846f91901730f3b185ca";

var bl = new { msgtype = "text", text = new { content = "不一样的烟火" } };
            string cs = new JavaScriptSerializer().Serialize(bl);
            string jg = HttpPost(url, cs);
            MessageBox.Show(jg);

  private string HttpPost(string Url, string postDataStr)
        {

            string strURL = Url;
            System.Net.HttpWebRequest request;
            request = (System.Net.HttpWebRequest)WebRequest.Create(strURL);
            request.Method = "POST";
            request.ContentType = "application/json;charset=UTF-8";
            string paraUrlCoded = postDataStr;
            byte[] payload;
            payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);
            request.ContentLength = payload.Length;
            Stream writer = request.GetRequestStream();
            writer.Write(payload, 0, payload.Length);
            writer.Close();
            System.Net.HttpWebResponse response;
            response = (System.Net.HttpWebResponse)request.GetResponse();
            System.IO.Stream s;
            s = response.GetResponseStream();
            string StrDate = "";
            string strValue = "";
            StreamReader Reader = new StreamReader(s, Encoding.UTF8);
            while ((StrDate = Reader.ReadLine()) != null)
            {
                strValue += StrDate + " ";
            }
            return strValue;

        }