static void Main(string[] args)
{
GamerManager gamerManager = new GamerManager();
Gamer gamer1 = new Gamer();
gamer1.FirstName = "BURAK";
gamer1.LastName = "EMİR";
gamer1.NationalityId = "0123456789";
Gamer gamer2 = new Gamer();
gamer2.FirstName = "ENES";
gamer2.LastName = "ZABIN";
gamer2.NationalityId = "9876543210";
gamerManager.Sign(gamer1);
gamerManager.Add(gamer1);
gamerManager.Delete(gamer2);
gamerManager.Update(gamer2);
Game game1 = new Game();
game1.GameId = 1;
game1.GameName = "PUBG";
game1.GamePrice = 87;
Game game2 = new Game();
game2.GameId = 2;
game2.GameName = "CSGO";
game2.GamePrice = 120;
CampaignManager campaignManager = new CampaignManager();
Campaign campaign = new Campaign();
campaign.CampaignId = 3;
campaign.CampaignName = "BAHAR DÖNEMİ İNDİRİMİ";
campaign.DiscountRate = 0.50M;
SaleManager saleManager = new SaleManager();
saleManager.SalePrice(game1, gamer1, campaign);
saleManager.SaleDiscount(game2, gamer2, campaign);
}