1SPNavigationNodeCollection quickLaunchNodes = newProjectSite.Navigation.QuickLaunch;
2                
3foreach(SPNavigationNode node in quickLaunchNodes) {
4    if (node.Title.Equals("Asiakirjat"))
5    {
6        node.MoveToFirst(quickLaunchNodes);
7        newProjectSite.Update();
8        break;
9    }
10}