C#中的Linq to Xml

public static void CreateElement(string XmlPath)
{
XDocument xdoc =
new XDocument(
new XDeclaration("1.0", "utf-8", ""),
new XElement("SimulationSettings",
new XElement("DevBunkerArr",
new XElement("DevBunkerSettings",
new XElement("ID", "B1000"),
new XElement("Delivery", "10"),
new XElement("Capacity", "5000")
),
new XElement("DevBunkerSettings",
new XElement("ID", "B1100"),
new XElement("Delivery", "10"),
new XElement("Capacity", "5000")
)
),
new XElement("DevConveyArr",                                         //皮带
new XElement("DevConveySettings",
new XElement("ID", "C1000"),
new XElement("Delivery", "35"),
new XElement("RatedSpeed", "2.0"),
new XElement("Length", "40"),
new XElement("StartingTime", "10"),
new XElement("StoppingTime", "2"),
new XElement("SectionNum", "10")
),
new XElement("DevConveySettings",
new XElement("ID", "C1001"),
new XElement("Delivery", "35"),
new XElement("RatedSpeed", "2.0"),
new XElement("Length", "60"),
new XElement("StartingTime", "10"),
new XElement("StoppingTime", "2"),
new XElement("SectionNum", "10")
)
)
)
);
xdoc.Save(XmlPath);
}

public static void QueryDevBunkerArr(string XmlPath, string ID)
{
//定义并从xml文件中加载节点（根节点）
XElement rootNode = XElement.Load(XmlPath);

//查询语句: 获取节点
IEnumerable<XElement> myTargetNodes = from myTarget in rootNode.Descendants("DevBunkerSettings")
where myTarget.Element("ID").Value == ID
select myTarget;
foreach (XElement node in myTargetNodes)
{
Console.WriteLine("ID = {0}", node.Element("ID").Value);
Console.WriteLine("Delivery = {0}", node.Element("Delivery").Value);
Console.WriteLine("Capacity = {0}", node.Element("Capacity").Value);
}
}

public static void DeleteDevBunkerArr(string XmlPath, string ID)
{

//定义并从xml文件中加载节点（根节点）
XElement rootNode = XElement.Load(XmlPath);

//查询语句: 获取节点
IEnumerable<XElement> myTargetNodes = from myTarget in rootNode.Descendants("DevBunkerSettings")
where myTarget.Element("ID").Value == ID
select myTarget;

myTargetNodes.Remove();
rootNode.Save(XmlPath);
}

public static void ModifyDevBunkerArr(string XmlPath, string ID)
{
//定义并从xml文件中加载节点（根节点）
XElement rootNode = XElement.Load(XmlPath);

//查询语句: 获取节点
IEnumerable<XElement> myTargetNodes = from myTarget in rootNode.Descendants("DevBunkerSettings")
where myTarget.Element("ID").Value == ID
select myTarget;

//修改 "Capacity"节点
foreach (XElement node in myTargetNodes)
{
node.Element("Capacity").SetValue(1);
}
rootNode.Save(XmlPath);
}