/// <summary>
/// Checks to see if the OS supports one of our supported payment methods and enables/disables the 'Checkout'
/// button based on the result.
/// </summary>
private async void CheckForSupportedPaymentMethods()
{
bool hasSupportedPaymentMethod = await WindowsPaymentOperation.HasSupportedPaymentMethod();
// Update values.
this.CheckoutButtonEnabled = hasSupportedPaymentMethod;
// Raise all the 'PropertyChanged' events.
this.RaisePropertyChanged(nameof(this.CheckoutButtonEnabled));
}
/// <summary>
/// Called when the 'Windows Checkout' button is clicked.
/// </summary>
public async void OnWindowsCheckoutClicked()
{
await WindowsPaymentOperation.CheckoutAsync(this.ShoppingCart);
}