xmlDocument

           XmlDocument doc = new XmlDocument( );
            doc.Load( "/XMLFile1.xml" );

            XmlNodeList list = doc.DocumentElement.SelectNodes( "//File" );//指定第一个子节点

            if ( list != null )
            {
                foreach ( XmlNode node in list )
                {
                    Console.WriteLine( node.Attributes[ "FileName" ].InnerText );
                }
            }