PlaceOrderPage.cs

public partial class PlaceOrderPage : BasePage
{
    private readonly PurchaseTestInput purchaseTestInput;

    public PlaceOrderPage(IWebDriver driver, PurchaseTestInput purchaseTestInput) : base(driver)
    {
        this.purchaseTestInput = purchaseTestInput;
    }

    public override string Url
    {
        get
        {
            return @"http://www.bing.com/";
        }
    }

    public void ChoosePaymentMethod()
    {
        if (!string.IsNullOrEmpty(this.purchaseTestInput.CreditCardNumber)
            && !this.purchaseTestInput.IsWiretransfer
            && !(this.purchaseTestInput.IsPromotionalPurchase && this.purchaseTestInput.TotalPrice < 5)
            && !(this.purchaseTestInput.TotalPrice == 0))
        {
            this.CreditCard.SendKeys("371449635398431");
            this.SecurityNumber.SendKeys("1234");
        }
        else
        {
            this.Wiretransfer.SendKeys("pathToFile");
        }
    }      
}