又一种XML的解析方法

[Fact(DisplayName="用户名为空")]
        public void Should_UsernameEmpty()
        {

            var paras = new Dictionary<string, string>
            {
                {"action","send"},
                {"userid",userid},
                {"account",""},
                {"password",password},
                {"mobile",mobile},
                {"content",content},
                {"sendtime",sendTime},
                {"extno",extno}
            };
            var rlt = HttpClientHelper.Instance.Post("sms.aspx", paras);
            Assert.False(string.IsNullOrEmpty(rlt));
            var root = XElement.Parse(rlt).XPathSelectElement("/");
            var msg = root.XPathSelectElement("message").Value;
            Assert.True(msg.Equals("用户名为空"));
        }

注意的是必须引用using System.Xml.Linq; using System.Xml.XPath;要不然是不能用的哦