private void mi_addComponent(object sender, EventArgs e)
        {
            IDesignerHost host = (IDesignerHost)this.GetService(typeof(IDesignerHost));

            if (host != null)
            {
                HostSurface surface = host.GetService(typeof(DesignSurface)) as HostSurface;
                if (surface != null)
                {
                    ClassPointer root = surface.Loader.GetRootId();
                    if (root != null)
                    {
                        root.AddComponent(null);
                    }
                }
            }
        }