C#实现如何使用短信平台自动通知用户

目前市面上的第三方短信服务平台数量十分庞大，并能为企业提供三网合一的短信接口，这些服务商通过整合短信发送服务，简单的打包成为API和SDK接口提供给企业，企业只需要在自己公司的平台上接入这些接口就可以实现，短信平台自动发送的功能，企业接入这些短信平台接口的流程十分简单，方式也不复杂。

使用中昱维信第三方平台接口

平台通过第三方公司提供接口实现短信群发，以下为中昱维信的短信群发示例：

 var client = new RestClient("https://vip.veesing.com/smsApi/group?appId=35LC8QJRI2YR&appKey=YKU2JJCN4KD9BEHN&phone=18302999492&content=【中昱维信】您的短信群发功能已开通，请在3个工作日之内至平台进行企业认证！");
            //构建post请求
            var request = new RestRequest(Method.POST);
            //设置请求头部参数
            request.AddHeader("cache-control", "no-cache");
            request.AddHeader("Connection", "keep-alive");
            request.AddHeader("Content-Length", "0");
            request.AddHeader("Accept-Encoding", "gzip, deflate");
            request.AddHeader("Host", "vip.veesing.com");
            request.AddHeader("Postman-Token", "77d8b8d3-7fe6-4dee-a157-f42701ee4cbe,04f24c10-e7da-4ca7-9729-e6e727770c9f");
            request.AddHeader("Cache-Control", "no-cache");
            request.AddHeader("Accept", "*/*");
            request.AddHeader("User-Agent", "PostmanRuntime/7.19.0");
            IRestResponse response = client.Execute(request);
            Console.WriteLine(response);
            Console.ReadKey();

平台通过第三方公司提供接口实现短信群发，以下为中昱维信的短信验证示例：

  var client = new RestClient("https://vip.veesing.com/smsApi/verifyCode?appId=35LC8QJRI2YR&appKey=YKU2JJCN4KD9BEHN&phone=18302999492&templateId=540&variables=1234");
            var request = new RestRequest(Method.POST);
            request.AddHeader("cache-control", "no-cache");
            request.AddHeader("Connection", "keep-alive");
            request.AddHeader("Content-Length", "0");
            request.AddHeader("Accept-Encoding", "gzip, deflate");
            request.AddHeader("Host", "vip.veesing.com");
            request.AddHeader("Postman-Token", "77d8b8d3-7fe6-4dee-a157-f42701ee4cbe,04f24c10-e7da-4ca7-9729-e6e727770c9f");
            request.AddHeader("Cache-Control", "no-cache");
            request.AddHeader("Accept", "*/*");
            request.AddHeader("User-Agent", "PostmanRuntime/7.19.0");