用XmlTextWriter寫出的XML檔案沒有換行，用記事本開啟XML檔案的時候都寫在了一行上，請問怎樣加入換行！

標籤：

 public partial class Form1 : Form    {        private string songlocation = @"D:\codeDemo\xml\xmlText\xmlDemo.xml";        private string[] songlist = new string[] {"a","b","c" };        public Form1()        {            InitializeComponent();        }        private void button1_Click(object sender, EventArgs e)        {            using (XmlTextWriter xwriter = new XmlTextWriter(songlocation, Encoding.UTF8))            {                //縮排, 不加這個,xml就是一行                xwriter.Formatting = Formatting.Indented;                xwriter.WriteStartDocument();                xwriter.WriteStartElement("myplayer");                xwriter.WriteStartElement("playingsongs");                xwriter.WriteAttributeString("total", songlist.Length.ToString());                for (int i = 0; i < songlist.Length; i++)                {                    xwriter.WriteAttributeString("song" + i.ToString(), songlist[i].ToString());                }                xwriter.WriteEndElement();                xwriter.WriteEndElement();                xwriter.WriteEndDocument();                //重新整理流                xwriter.Flush();                xwriter.Close();            }        }    }

 來源:http://social.microsoft.com/Forums/es-ES/visualcshartzhchs/thread/f0b1f040-724c-48d3-aa59-b828e45ddeca

用XmlTextWriter寫出的XML檔案沒有換行，用記事本開啟XML檔案的時候都寫在了一行上，請問怎樣加入換行！