public async System.Threading.Tasks.Task SelectAtAsync(int X, int Y)
{
foreach (CellViewModel viewModel in Cells)
{
viewModel.IsSelected = (viewModel.X == X) && (viewModel.Y == Y);
}
foreach (WorkerViewModel viewModel in Workers)
{
viewModel.IsSelected = (viewModel.X == X) && (viewModel.Y == Y);
}
await SelectedItems.LoadAsync(MapItems.Where(item => (item.X == X) && (item.Y == Y)));
SelectedItems.SelectedItem = SelectedItems.FirstOrDefault();
}