public bool IsStraight(Hand hand)
{
CardCollection cards = new CardCollection(hand.OrderBy(c => c.Rank.Value));
for (int i = 0; i < cards.Count; ++i)
{
if (cards.Count > i)
{
if ((cards[i].Rank.Value + 1) != cards[i + 1].Rank.Value)
return false;
}
}
return true;
}
