说明： C#中XML解析的DEMO程序，绝对经典！学习C#者必备
(C# In XML parsing DEMO procedures, an absolute classic! Learning C# Are essential)
文件列表：
XMLDemo
.......\DemoXslt.xml
.......\DemoXslt.xsl
.......\XmlDemo
.......\.......\AssemblyInfo.cs
.......\.......\Authors.xml
.......\.......\bin
.......\.......\...\Debug
.......\.......\Books.dtd
.......\.......\Books.xml
.......\.......\books.xsd
.......\.......\books.xsx
.......\.......\BooksDTD.xml
.......\.......\BooksDTDFAIL.xml
.......\.......\BooksSchema.xml
.......\.......\BooksSchemaFAIL.xml
.......\.......\DemoXml.cs
.......\.......\DocumentSaveOutput.xml
.......\.......\obj
.......\.......\...\Debug
.......\.......\po.xml
.......\.......\po.xsd
.......\.......\po.xsd.bak
.......\.......\po.xsx
.......\.......\poschema.xsd
.......\.......\poschema.xsx
.......\.......\sample.xml
.......\.......\schema.xsd
.......\.......\schema.xsd.bak
.......\.......\schema.xsx
.......\.......\TextWriterOutput.xml
.......\.......\XmlDemo.csproj
.......\.......\XmlDemo.csproj.user
.......\.......\XmlDemo.sln
.......\.......\XmlDemo.sln.old
.......\.......\XmlDemo_Debug.projdata
.......\.......\XmlDocumentOutput.xml
.......\.......\XmlSchemaObjectModel.cs
