static void Main(string[] args)
{
SingleBet singleBet = new SingleBet();
ComboBet comboBet = new ComboBet();
singleBet.PlaceBet();
comboBet.PlaceBet();
}
static void Main(string[] args)
{
DbController dc = new DbController();
SingleBet sb = new SingleBet();
ComboBet cb = new ComboBet();
// subscribe
sb.BetPlaced += dc.OnBetPlaced;
cb.BetPlaced += dc.OnBetPlaced;
sb.PlaceBet();
cb.PlaceBet();
// unsubscribe
sb.BetPlaced -= dc.OnBetPlaced;
cb.BetPlaced -= dc.OnBetPlaced;
}