public static LoadHistoricalPriceViewModel LoadViewModel(Action <Task> onLoaded = null)
        {
            LoadHistoricalPriceViewModel viewModel = new LoadHistoricalPriceViewModel();

            //viewModel.Load().ContinueWith(t => onLoaded?.Invoke(t));

            return(viewModel);
        }
 public MainViewModel()
 {
     LoadHistoricalPriceViewModel = LoadHistoricalPriceViewModel.LoadViewModel();
 }