public void ProcessPayment(string orderData)
{
var paymentProvider = new PayPalPaymentProvider();
var result = paymentProvider.Execute(orderData);
MessageBox.Show(result.ToString());
}
static void Main(string[] args)
{
// Define strategies which have to concrete implementation of the run method
IPaymentProvider googlePay = new GooglePayPaymentProvider();
IPaymentProvider applePay = new ApplePayPaymentProvider();
IPaymentProvider paypal = new PayPalPaymentProvider();
// Call the context with different concrete implementations
Console.WriteLine(PaymentProcessor.ProcessPayment(googlePay));
Console.WriteLine(PaymentProcessor.ProcessPayment(applePay));
Console.WriteLine(PaymentProcessor.ProcessPayment(paypal));
Console.ReadLine();
}