Linq to xml小疑点，多谢各位了！初学者给你们鞠躬了

Linq to xml小问题，在线等，谢谢各位了！菜鸟给你们鞠躬了！
我的xml

XML code

<?xml version="1.0" encoding="gb2312"?><Configurations version="987654" xmlns="http://www.ytlcn.com">  <SensorDefList>    <SensorDef id="1" name="红外传感器" description="" type="273" address="9a3b2451" />    <SensorDef id="2" name="门廊开关" description="门廊灯" type="258" address="9a3b2452" />    <SensorDef id="3" name="厨房卫生间开关" description="单键开关" type="258" address="9a3b2453" />    <SensorDef id="4" name="客厅开关" description="双键开关" type="260" address="9a3b2454" />    <SensorDef id="5" name="卧室床头开关" description="单键开关" type="258" address="9a3b2455" />    <SensorDef id="6" name="卧室门口开关" description="双键开关" type="260" address="9a3b2456" />    <SensorDef id="7" name="卧室阳台门窗磁" description="" type="272" address="9a3b2457" />    <SensorDef id="8" name="阳台照度传感器" description="" type="514" address="9a3b2458" />    <SensorDef id="9" name="门卡" description="" type="274" address="9a3b2459" />    <SensorDef id="10" name="关门廊灯定时器" description="" type="771" param1="3" />    <SensorDef id="11" name="温感" description="" type="1025" address="9a3b2461" />    <SensorDef id="12" name="天亮时段" description="" type="770" param1="180" param2="e3" />    <SensorDef id="13" name="傍晚时段" description="" type="770" param1="480" param2="e3" />  </SensorDefList></Configurations>

我的代码

C# code

            XDocument doc = new XDocument();            doc = XDocument.Load(AppDomain.CurrentDomain.BaseDirectory + "Configuration.xml");            List<XElement> elementList = doc.Descendants("SensorDef").ToList();

为什么elementList个数为O，没有找到？？给个例子。谢谢。在线等



[解决办法]
你没有加名称空间。你应该这样

XNamespace ns = "http://www.ytlcn.com";
List<XElement> elementList = doc.Descendants(ns + "SensorDef").ToList();

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