public class TreeViewExample {
    public static void Main ()
    {
        Gtk.Application.Init ();
        new TreeViewExample ();
        Gtk.Application.Run ();
    }

    public TreeViewExample ()
    {
        Gtk.Window window = new Gtk.Window ("TreeView Example");
        window.SetSizeRequest (500,200);

        MusicTreeView tree = new MusicTreeView ();
        window.Add (tree);
        window.ShowAll ();
    }
}

// Creating a new class MusicTreeView which is derived from the TreeView class
public class MusicTreeView : Gtk.TreeView {

        private Gtk.ListStore musicListStore;

        public MusicTreeView ()
        {
                musicListStore = new Gtk.ListStore (typeof (string), typeof (string));

                this.AppendColumn ("Artist", new Gtk.CellRendererText (), "text", 0);
                this.AppendColumn ("Title", new Gtk.CellRendererText (), "text", 1);

                musicListStore.AppendValues ("Garbage", "Dog New Tricks");
                musicListStore.AppendValues ("The Chemical Brothers", "Galvanize");
                this.Model = musicListStore;
        }

        // The TreeView has a build in function which is called upon a OnButtonPressEvent
        // We override the function to capture right clicks with the mouse
        protected override bool OnButtonPressEvent (Gdk.EventButton evnt)
        {
                if(evnt.Button == 3) {
                        Gtk.TreePath path = new Gtk.TreePath();
                        // Get TreePath from the xy-coordinates of the mouse from the event
                        // GetPathAtPos is a function from the TreeView class
                        GetPathAtPos (System.Convert.ToInt16 (evnt.X), System.Convert.ToInt16 (evnt.Y), out path);
                        Gtk.TreeIter iter;
                        // Get iter from the path
                        if (this.musicListStore.GetIter (out iter, path)) {
                                // Get artist and title from the iter
                                string artist = (string) this.musicListStore.GetValue (iter, 0);
                                string title = (string) this.musicListStore.GetValue (iter, 1);
                                System.Console.WriteLine ("Artist: " + artist + ", Title: " + title);
                        }
                        return true;
                }
                // Now if we would ever get this far
                // we run the TreeViews OnButtonPressEvent function
                // to make sure everything else works as normal
                return base.OnButtonPressEvent(evnt);
        }
}

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:param name="attribute"/>
    <xsl:param name="oldvalue"/>
    <xsl:param name="newvalue"/>

    <xsl:template match="node()|@*">
    <xsl:copy>
        <xsl:apply-templates select="@*|node()"/>
    </xsl:copy>
    </xsl:template>

    <!-- This is a generic search replace of attribute values -->
    <xsl:template match="@*" priority="10">
        <xsl:attribute name="{name()}">
            <xsl:choose>
                <xsl:when test="(name()=$attribute) and (. = $oldvalue)"><xsl:value-of select="$newvalue"/></xsl:when>
                <xsl:otherwise><xsl:value-of select="."/></xsl:otherwise>
            </xsl:choose>
        </xsl:attribute>
    </xsl:template>
</xsl:stylesheet>

xsltproc --stringparam attribute port --stringparam oldvalue 5011 --stringparam newvalue 5015 attribute_replace.xslt server_config.xml > new_server_config.xml