public virtual void RemoveMember(Player player)
{
if (! IsPlayerAlreadyInTeam(player)) throw new InvalidOperationException("Player not in team!");
if (player.Equals(TwelfthMan))
{
twelfthMan = null;
}
else
{
members.Remove(player);
}
}
public virtual bool IsPlayerAlreadyInTeam(Player player)
{
// notice I can use Contains() and Equals() instead of digging down to ID's.
// this also works for value objects. Implement Equals()!
return members.Contains(player) || player.Equals(TwelfthMan);
}