XmlDocument xmlDoc = new XmlDocument ();
xmlDoc.Load ("students.xml");
XmlNodeList nodelist = xmlDoc.SelectSingleNode ("Students").ChildNodes ;
foreach(XmlNode node in nodelist)
{
XmlElement xe = (XmlElement )node;
if(xe.GetAttribute ("city")=="dalian")
{
xe.RemoveAttribute ("city");
}
else if(xe.GetAttribute ("city")=="shanghai")
{
xe.RemoveAll ();
}
}
xmlDoc .Save ("students.xml");