public ActionResult Index()
        {
            var data = _holdingViewModelBuilder.BuildViewModels();

            var viewResult = new ViewResult
            {
                ViewName = "Index",
                ViewData = { Model = data.ToArray() }
            };

            return(viewResult);
        }
        private void PopulateTable()
        {
            var holdingViewModels = _holdingViewModelBuilder.BuildViewModels();

            HoldingsDataGrid.ItemsSource = holdingViewModels;
        }