这个程序不知道如何终止

时间：2010-12-10 来源：cuishengli

books.xml

<?xml version="1.0" encoding="utf-8" ?>
<!--sample XML fragment-->
<bookstore>
    <book genre='novel' ISBN='10-861003-324'>
        <title>The Handmaid's Tale</title>
        <price>19.95</price>
    </book>
    <book genre='novel' ISBN='1-861001-57-5'>
        <title>Pride And Prejudice</title>
        <price>24.95</price>
    </book>
</bookstore>

代码：

        static void TestReadOuterXml()
        {
            XmlReaderSettings settings = new XmlReaderSettings();
            settings.IgnoreWhitespace = true;

            using(XmlReader reader = XmlReader.Create("books.xml"))
            {

                // Moves the reader to the root element.
                reader.MoveToContent();

                // Moves to book node.
                reader.Read();

                var i=0;
                while(i<100){
                    Console.WriteLine("Read the {0} book using ReadOuterXml...",i);
                    Console.WriteLine(reader.ReadOuterXml());
                    Console.ReadLine();
                    i++;
                };
            }
            Console.ReadLine();

        }

这个程序假定有许多书，要求一本一本的读出。请问如何读出所有书后退出循环？