public void DeleteNodes()
{
var dom = new XmlDocument();
dom.LoadXml(@"<?xml version='1.0' encoding='utf-8'?>
<html>
<body>
<div class='A'><textarea>A1</textarea></div>
<div class='B'><textarea>B</textarea></div>
<div class='A'><textarea>A2</textarea></div>
</body>
</html>");
dom.DeleteNodes("descendant-or-self::*[contains(@class, 'A')]");
Assert.AreEqual(1, dom.SafeSelectNodes("html/body/div").Count);
Assert.AreEqual("<textarea>B</textarea>", dom.SafeSelectNodes("html/body/div")[0].InnerXml);
}
