Navigating the different modules through a TreeView and ToolBar with Prism


namespace NavInfrastructure
{
   internal static class CommandHelper
    {
       #region Helpers
       internal static System.Windows.Window GetTopWindow(System.Windows.DependencyObject window)
       {
           var obj = System.Windows.Media.VisualTreeHelper.GetParent(window);
           System.Windows.Window wind = obj as System.Windows.Window;
           if (wind == null)
           {
               wind = GetTopWindow(obj);
           }
           return wind as System.Windows.Window;
       }
       #endregion
    }
}