//Marble fell in its hole
private void FillTheHoleIfMarbleIsIn(Marble marble)
{
Hole marbleHole = Holes.First(h => h.Number == marble.Number);
if (marbleHole.Position.Row == marble.Position.Row && marbleHole.Position.Column == marble.Position.Column)
{
marbleHole.IsFilled = true;
marble.IsInHole = true;
}
}