Fastest way to add new node to end of an xml?

Question

I have a large xml file (approx. 10 MB) in following simple structure:

   .......
   .......         


        

Answer 1

Try this out:

        var doc = new XmlDocument();
        doc.LoadXml("This is my first error");

        XmlNode root = doc.DocumentElement;

        //Create a new node.
        XmlElement elem = doc.CreateElement("error");
        elem.InnerText = "This is my error";

        //Add the node to the document.
        if (root != null) root.AppendChild(elem);

        doc.Save(Console.Out);
        Console.ReadLine();