using System;

using System.Xml;

public class Program

{

    public static void Main()

    {

        XmlDocument document = new XmlDocument();

        document.LoadXml(@"<myCourse>

  <courseName>BEng Mobile and Web Computing</courseName>

  <courseStructure>

    <module>

      <moduleTitle>Programming Methodology</moduleTitle>

      <credits>15</credits>

      <semester>1</semester>

    </module>

    <module>

      <moduleTitle>Computer Systems Fundamentals</moduleTitle>

      <credits>15</credits>

      <semester>1</semester>

    </module>

  </courseStructure>

</myCourse>");

​

        // Get the root element.

        XmlElement root = document.DocumentElement;

​

        // Create the new nodes.

            XmlElement newModule = document.CreateElement("module");

            XmlElement newTitle = document.CreateElement("moduleTitle");

            XmlElement newCredits = document.CreateElement("credits");

            XmlElement newSemester = document.CreateElement("semester");

            XmlText title = document.CreateTextNode("ECA411");

            XmlText credits = document.CreateTextNode("15");

            XmlText semester = document.CreateTextNode("1");

​

            // Insert the elements.

            //newBook.AppendChild(newTitle);

            //newBook.AppendChild(newCredits);

            //newBook.AppendChild(newSemester);

            newTitle.AppendChild(title);

            newCredits.AppendChild(credits);

            newSemester.AppendChild(semester);

            root.InsertAfter(newModule, root.LastChild);

        Console.WriteLine(root.OuterXml);

    }

}