protected override void OnInitialActivate()
        {
            if (_installationService.GetInstallKey() == null)
            {
                ActiveItem = _installViewModel;
            }
            else if (_installationService.Args.Contains("-uninstall"))
            {
                ActiveItem = _uninstallViewModel;
            }
            else
            {
                ActiveItem = _modifyViewModel;
            }

            base.OnInitialActivate();
        }