推荐订阅源

System.Xml.XmlReader myReader;
...
myReader = mySqlCommand.ExecuteXmlReader();

DataSet
DataSet myDataSet = new DataSet();
读
myDataSet.ReadXml("C:\\myData.XML");

结构
myDataSet.ReadXmlSchema("C:\\mySchema.XML");

写
myDataSet.WriteXml("C:\\myData.XML");

结构
myDataSet.WriteXmlSchema("C:\\mySchema.XML");

使用XmlDataDocument类
XmlDataDocument myDoc = mew XmlDataDocument(myDataSet);
或
XmlDataDocument myDoc = mew XmlDataDocument();
myDoc.DataSet.ReadXmlSchema("C:\\myXml.xml"); //导入结构
myDoc.Load("C:\\myXml.xml");  //导入数据

执行XSLT转换
Xml.Xsl.XslTransform myTransform = new Xml.Xsl.XslTransform();
myTransform.Load("C:\myStyle.xsl");

写入文件
System.IO.StreamWriter myWriter = new System.IO.StreamWriter("myTextfile.txt");
myTransform.Transform(myDocument, null , myWriter);