protected override void OnDeactivate()
        {
            if (_workspace != null)
            {
                _workspace.Deactivate();
            }

            _projectMRUList = null;

            base.OnDeactivate();
        }
        protected override void OnActivate()
        {
            string projectMRUKey = string.Format("{0}\\{1}", Constants.CurrentUserRegistryPath, "ProjectMRUList");

            _projectMRUList = new MRUListViewModel(this, projectMRUKey, 10);

            AttachEvents();

            ShowStartPage();

            base.OnActivate();
        }