using System;

using System.Xml;

public class Program

{

    public static void Main()

    {

        var doc = new XmlDocument();

        var root = doc.CreateElement("MalFrags");

        root.Attributes.Append(doc.CreateAttribute("xmlns:fo")).Value = "http://www.w3.org/1999/XSL/Format";

        var context = doc.CreateElement("Context");

        var foclock = doc.CreateElement("fo:block", "http://www.w3.org/1999/XSL/Format");

        context.AppendChild(foclock);

        root.AppendChild(context);

        context = doc.CreateElement("Context");

        foclock = doc.CreateElement("fo:block", "http://www.w3.org/1999/XSL/Format");

        context.AppendChild(foclock);

        root.AppendChild(context);

        doc.AppendChild(root);

        doc.Save(Console.Out);

    }

}