C#读写xml

读：

XmlDocument xmlDoc = new XmlDocument();
XmlReaderSettings settings = new XmlReaderSettings();
settings.IgnoreComments = true;
settings.IgnoreWhitespace = true;
XmlReader reader = null;
reader = XmlReader.Create(fileName, settings);
xmlDoc.Load(reader);
//获取名为Root的节点
XmlNode root = xmlDoc.SelectSingleNode("Root");
//节点的属性,clazz属性值
XmlAttribute xmlAttr = root.Attributes["clazz"];
String type = xmlAttr == null ? null : xmlAttr.Value;
//遍历这个节点的子节点
foreach(XmlNode subNode in root){
    //节点值
    subNode.Value;
}

写：

XmlDeclaration Declaration = xmlDoc.CreateXmlDeclaration("1.0", "utf-8", null);
xmlDoc.InsertBefore(Declaration, xmlDoc.DocumentElement);
//创建Root节点
XmlNode rootNode = xmlDoc.CreateElement("Root");
xmlDoc.AppendChild(rootNode);
//Root的子节点branch
XmlNode branch=xmlDoc.CreateElement("branch");
rootNode.AppendChild(branch);
//给branch添加属性type="branch"
XmlAttribute attr=xmlDoc.CreateAttribute("type");
attr.Value="branch";
branch.Attributes.Append(attr);
//保存到文件
xmlDoc.save(fileName);