public bool IsValid()
{
return
(Width > 0 &&
Height > 0 &&
IsValidPosition(StartPosition) &&
IsValidPosition(Exit) &&
!StartPosition.IsEqual(Exit) &&
!Mines.Any(x => x.IsEqual(StartPosition)) &&
!Mines.Any(x => x.IsEqual(Exit)));
}
private bool IsHitByAMine(Position position)
{
return(Mines.Any(x => x.Position == position.Position));
}