private void BuyItem(CommercialBuilding building, ICommercial item, Button button)
 {
     try
     {
         int currentCash = ninja.Cash;
         building.Sell(item, ninja);
         if(currentCash == ninja.Cash)
         {
             MessageBox.Show("You rich the maximum of items that you can hold (10 items per category)!");
         }
     }
     catch (ArgumentException ex)
     {
         MessageBox.Show(ex.Message);
     }
     button.PerformClick();
 }
        private void btnPizza_Click(object sender, EventArgs e)
        {
            fastFood = FastFood.Instance;

            pnlPizza.Visible = true;
            lblPizzaCashValue.Text = ninja.Cash.ToString();
            lblPizzaCokePrice.Text = "Price:" + fastFood.Goods[0].Price;
            lblPizzaCokeEnergy.Text = "Energy: " + ((Energizer)fastFood.Goods[0]).HealingPoints;
            lblPizzaCoffeePrice.Text = "Price:" + fastFood.Goods[1].Price;
            lblPizzaCoffeeEnergy.Text = "Energy: " + ((Energizer)fastFood.Goods[1]).HealingPoints;
            lblPizzaIceCreamPrice.Text = "Price:" + fastFood.Goods[2].Price;
            lblPizzaIceCreamEnergy.Text = "Energy: " + ((Energizer)fastFood.Goods[2]).HealingPoints; ;
            lblPizzaHamburgerPrice.Text = "Price:" + fastFood.Goods[3].Price;
            lblPizzaHamburgerEnergy.Text = "Energy: " + ((Energizer)fastFood.Goods[3]).HealingPoints;
            lblPizzaPizzaPrice.Text = "Price:" + fastFood.Goods[4].Price;
            lblPizzaPizzaEnergy.Text = "Energy: " + ((Energizer)fastFood.Goods[4]).HealingPoints;
            lblPizzaEnergydrinkPrice.Text = "Price:" + fastFood.Goods[5].Price;
            lblPizzaEnergydrinkEnergy.Text = "Energy: " + ((Energizer)fastFood.Goods[5]).HealingPoints;
        }
 private void btnPlayground_Click(object sender, EventArgs e)
 {
     playground = Playground.Instance;
     pnlPlayground.Visible = true;
     lblPlaygroundCash.Text = ninja.Cash.ToString();
     lblPlaygroundPokerPrice.Text = "Price: " + playground.Goods[0].Price;
     lblPlaygroundPokerEnergy.Text = "Power: " + ((Recreation)playground.Goods[0]).UpgradeTotalEnergy; ;
     lblPlaygroundVideoPrice.Text = "Price: " + playground.Goods[1].Price;
     lblPlaygroundVideoEnergy.Text = "Power: " + ((Recreation)playground.Goods[1]).UpgradeTotalEnergy; ;
     lblPlaygroundBowlingPrice.Text = "Price: " + playground.Goods[2].Price;
     lblPlaygroundBowlingEnergy.Text = "Power: " + ((Recreation)playground.Goods[2]).UpgradeTotalEnergy; ;
     lblPlaygroundBilliardsPrice.Text = "Price: " + playground.Goods[3].Price;
     lblPlaygroundBilliardsEnergy.Text = "Power: " + ((Recreation)playground.Goods[3]).UpgradeTotalEnergy; ;
     lblPlaygroundDancePrice.Text = "Price: " + playground.Goods[4].Price;
     lblPlaygroundDanceEnergy.Text = "Power: " + ((Recreation)playground.Goods[4]).UpgradeTotalEnergy; ;
 }
        private void btnMall_Click(object sender, EventArgs e)
        {
            mall = ShoppingMall.Instance;

            pnlMall.Visible = true;
            lblMallCash.Text = ninja.Cash.ToString();
            lblMallShurikanPrice.Text = "Price:" + mall.Goods[2].Price;
            lblMallShurikanPower.Text = "Power: " + ((Power)mall.Goods[2]).AttackPower;
            lblMallBaseballPrice.Text = "Price:" + mall.Goods[1].Price;
            lblMallBaseballPower.Text = "Power: " + ((Power)mall.Goods[1]).AttackPower;
            lblMallHammerPrice.Text = "Price:" + mall.Goods[0].Price;
            lblMallHammerPower.Text = "Power: " + ((Power)mall.Goods[0]).AttackPower; ;
            lblMallTomahawkPrice.Text = "Price:" + mall.Goods[3].Price;
            lblMallTomahawkPower.Text = "Power: " + ((Power)mall.Goods[3]).AttackPower;
            lblMallPoisonDartPrice.Text = "Price:" + mall.Goods[4].Price;
            lblMallPoisonDartPower.Text = "Power: " + ((Power)mall.Goods[4]).AttackPower;
            lblMallForumflagPrice.Text = "Price:" + mall.Goods[5].Price;
            lblMallForumflagPower.Text = "Power: " + ((Power)mall.Goods[5]).AttackPower;
            lblCSharpBookPrice.Text = "Price:" + mall.Goods[7].Price;
            lblCSharpBookPower.Text = "Power: " + ((Power)mall.Goods[7]).AttackPower;
            lblMallHelpFromTeamPrice.Text = "Price:" + mall.Goods[8].Price;
            lblHelpFromTeamPower.Text = "Power: " + ((Power)mall.Goods[8]).AttackPower;
            lblHelpFromTrainerPrice.Text = "Price:" + mall.Goods[9].Price;
            lblHelpFromTrainerPower.Text = "Power: " + ((Power)mall.Goods[9]).AttackPower;
            lblMallVirusPrice.Text = "Price:" + mall.Goods[6].Price;
            lblMallVirusPower.Text = "Power: " + ((Power)mall.Goods[6]).AttackPower;
        }