public IEnumerable <Cell <State> > Neighbors(Cell <State> cell)
{
var neighbors_position = Neighborhood.Neighbors(cell.Position);
return(neighbors_position
.Select(PositionToIndex)
.Select(Cells.ElementAt));
}
public Cell Apply(Neighborhood neighborhood)
{
return(killerNeighborhoods.Contains(neighborhood) ? Cell.Death : Cell.Alive);
}