private async Task MarkAsRead(PieceOfInformation value) {
if (value == null) return;
await Task.Delay(1000);
if (value != Piece) return;
if (Application.Current.MainWindow?.IsActive == true) {
value.MarkAsRead();
}
}
private void OnPieceChanged(PieceOfInformation newValue) {
MarkAsRead(newValue).Forget();
}