public static void FinalizeSession(decimal ID)
{
var session = sessions.Where(sess => sess.ID == ID).First();
sessions.Remove(session);
players.AsObservableCollection()
.Where(player => player.SessionID == ID)
.ForEach(player =>
{
player.SessionID = -1;
player.Bet = 0;
player.Hand = null;
});
}