问XMLTextReader C#

EN

XmlTextReader reader = new XmlTextReader ("books.xml");

while (reader.Read()) 
{
    switch (reader.NodeType) 
    {
        case XmlNodeType.Element: // The node is an element.
            Console.Write("<" + reader.Name);
            Console.WriteLine(">");
            break;
        case XmlNodeType.Text: //Display the text in each element.
            Console.WriteLine (reader.Value);
            break;
        case XmlNodeType. EndElement: //Display the end of the element.
            Console.Write("</" + reader.Name);
        Console.WriteLine(">");
            break;
    }
}

string content = reader.ReadElementContentAsString();