NTMenuItem

private NTMenuItem myNewMenuItem;
private NTMenuItem existingControlCenterNewMenu;
protected override void OnWindowCreated(Window window)
{
    // We want to place the menu item for the AddOn in the Control Center's "New" menu
    // First obtain a reference to the Control Center window
    ControlCenter cc = window as ControlCenter;
    if (cc == null)
        return;
    /* Determine we want to place the AddOn in the Control Center's "New" menu
    Other menus can be accessed via the control's "Automation ID". For example: toolsMenuItem, workspacesMenuItem, connectionsMenuItem, helpMenuItem. */
    existingControlCenterNewMenu = cc.FindFirst("ControlCenterMenuItemNew") as NTMenuItem;
    if (existingControlCenterNewMenu == null)
        return;
    // Instantiate myNewMenuItem
    // 'Header' sets the name of our AddOn seen in the menu structure. 'Style' sets the font style.
    myNewMenuItem = new NTMenuItem { Header = "AddOn Framework", Style = Application.Current.TryFindResource("MainMenuItem") as Style };
    // Add our AddOn menu item into the "New" menu
    existingControlCenterNewMenu.Items.Add(myNewMenuItem);
    // Subscribe to the event for when the user presses the menu item
    myNewMenuItem.Click += OnMenuItemClick;
}