CmsLsMac.WsSmsServiceService cms=new CmsLsMac.WsSmsServiceService ();//短信接口

            myContent mycontent = new myContent();

            string md5= UserMd5("加密信息");

            mycontent.ecName = "企业名称";

            mycontent.apId = "账号";

            mycontent.secretKey = "密码";

            //mycontent.mobiles = "电话";

            mycontent.content = "今天有雷阵雨";

            mycontent.sign = "签名";

            mycontent.addSerial = "";//可以为null

            List<string> list = new List<string>();

            list.Add("电话");//具体有哪些电话号码

            string mobezz = "";

            foreach (var item in list)

            {

                mobezz += item;

            }

            //md5加密

            mycontent.mac = UserMd5(mycontent.ecName + mycontent.apId + mycontent.secretKey + mobezz + mycontent.content + mycontent.sign);

            string str="<?xml version=\"1.0\" encoding=\"utf-8\"?>" + "<WsSubmitReq>" + "  <apId>" + mycontent.apId + "</apId>" + "  <secretKey>" + mycontent.secretKey + "</secretKey>"

             + "  <ecName>" + mycontent.ecName + "</ecName>" + "  <mobiles>" + GetMobiles(list)

             + "  </mobiles>" + "  <content>" + mycontent.content + "</content>" + "  <sign>" + mycontent.sign + "</sign>" + "  <addSerial>" + mycontent.addSerial + "</addSerial>"

             + "  <mac>" + mobezz  + "</mac>" + "</WsSubmitReq>";
　　　　　　　var returnz= cms.sendSms（str）；//发送短信方法  根据返回值查看是否发送成功。

public  string UserMd5(string str)

        {

            string cl = str;

            string pwd = "";

            MD5 md5 = MD5.Create();//实例化一个md5对像

            // 加密后是一个字节类型的数组，这里要注意编码UTF8/Unicode等的选择　

            byte[] s = md5.ComputeHash(Encoding.UTF8.GetBytes(cl));

            // 通过使用循环，将字节类型的数组转换为字符串，此字符串是常规字符格式化所得

            for (int i = 0; i < s.Length; i++)

            {

                // 将得到的字符串使用十六进制类型格式。格式后的字符是小写的字母，如果使用大写（X）则格式后的字符是大写字符

                 pwd = pwd + s[i].ToString("x2");

             }

             return pwd;

        }

        public string GetMobiles(List<string> list)

        {

            StringBuilder soap = new StringBuilder();

            foreach (var item in list)

	        {

                soap.Append("<string>" + item + "</string>");

	        }

            return soap.ToString();

        }