private void PreviousNavCommandHandler()
        {
            ResourceListView.MoveCurrentToPrevious();

            if (ResourceListView.IsCurrentBeforeFirst == true)
            {
                ResourceListView.MoveCurrentToFirst();
            }

            SelectedResource = (ResourceModel)ResourceListView.CurrentItem;
        }
        private void FirstNavCommandHandler()
        {
            ResourceListView.MoveCurrentToFirst();

            SelectedResource = (ResourceModel)ResourceListView.CurrentItem;
        }