.NET Framework ネタ

XmlDocument xd = new XmlDocument();

xd.AppendChild(xd.CreateXmlDeclaration("1.0", "UTF-8", null));

xd.AppendChild(xd.CreateElement("root"));

XmlElement xe = xd.CreateElement("element");

xe.SetAttribute("attribute", "value");

xe.InnerText = "text";

xd.DocumentElement.AppendChild(xe);

xd.Save("x.xml");

XmlDocument xd = new XmlDocument();

xd.Load("x.xml");

XmlNode xn = xd.DocumentElement.SelectSingleNode("/root/element[attribute::attribute='value']");

if (xn != null) 

{

	Console.WriteLine(xn.InnerText);

	xn.InnerText = "てすと";

	xd.Save("x.xml");

}

…成る程