using System;

using System.Xml;

using System.Xml.Linq;

public class Program

{

    public static void Main()

    {

        XNamespace defaultNamespace = "http://my-project.org/log4j/";

        var root = new XElement("root", new XAttribute(XNamespace.Xmlns + "log4j", defaultNamespace));

        var eventElement = new XElement(defaultNamespace + "event");

        root.Add(eventElement);

        eventElement.SetAttributeValue("logger", "MyTools");

        eventElement.SetAttributeValue("level", "WARN");

        eventElement.SetAttributeValue("timestamp", DateTime.Now.Millisecond);

        eventElement.SetElementValue(defaultNamespace + "message", "This is a log message.");

        root.ToString().Dump();

        eventElement.ToString().Dump();

    }

}