C#

Mika Wendelius wrote:

it depends on (all of) your requirements.

public class CClub
{
    int m_id;
    string m_name;

    public string GenerateXml()
    {
        return 
            "<Club ID=\"" + m_id.ToString() + "\">\n" +
                "<Name>" + m_name + "</Name>\n" +
            "</Club>\n";
    }
}

public class CClub
{
    int m_id;
    string m_name;

    public void ReadXml(XmlElement element)
    {
        m_id = Convert.ToInt32(element.GetAttribute("Club"));

        foreach (XmlNode node in element.ChildNodes)
        {
            if (node.NodeType == XmlNodeType.Element &&
                node.Name == "Club")
            {
                m_name = node.InnerText;
            }
        }
    }

    public void WriteXml(XmlNode parentNode)
    {
        XmlElement element = parentNode.OwnerDocument.CreateElement("Club");
        parentNode.AppendChild(element);

        // Save the ID
        element.SetAttribute("Club", m_id.ToString());

        // Save the name
        XmlElement elementName = parentNode.OwnerDocument.CreateElement("Name");
        element.AppendChild(elementName);
        elementName.InnerText = m_name;
    }
}

public class CDepartment
{
    CDepartmentInfo m_departmentInfo;
    CClubs          m_clubs;
    CTeachers       m_teachers;

    public void ReadXml(XmlDocument element)
    {
        foreach (XmlNode node in element.ChildNodes)
        {
            if (node.NodeType == XmlNodeType.Element)
            {
                switch (node.Name)
                {
                    case "DepartmentInfo":
                        m_departmentInfo = new CDepartmentInfo();
                        m_departmentInfo.ReadXml(node as XmlElement);
                    case "Clubs":
                        m_clubs = new CClubs();
                        m_clubs.ReadXml(node as XmlElement);
                    case "Teachers":
                        m_teachers = new CTeachers();
                        m_teachers.ReadXml(node as XmlElement);
                }
            }
        }
    }

    public void WriteXml(XmlDocument document)
    {
        m_departmentInfo.WriteXml(document);
        m_clubs.WriteXml(document);
        m_teachers.WriteXml(document);
    }
}