Razor PaymentGateway (Xamarin.Android)

Question

When we implement the on the android then it give me an error, Error: onPaymentError probably not implemented in your activate. this is my code which implemented by the xamarin android.

 

public class MediaService : Java.Lang.Object, IMediaService, IPaymentResultWithDataListener
{
    public void OnPaymentError(int p0, string p1, PaymentData p2)
    {
        throw new NotImplementedException();
    }
    public void OnPaymentSuccess(string p0, PaymentData p1)
    {
        throw new NotImplementedException();
    }
    public async Task Rezorpement()
    {
        Checkout checkOut = new Checkout();
        checkOut.SetKeyID("rzp_test_njHDC3yxiupZqA");
        MainActivity activity = Forms.Context as MainActivity;
        try
        {
            JSONObject options = new JSONObject();
            options.Put("description", "My Sample Payment activity");
            options.Put("order_id", "order_EAMgUyLXrMfbmL");
            options.Put("currency", "INR");
            options.Put("amount", "100");
            checkOut.Open(activity, options);
        }
        catch (Exception ex)
        {
            Console.WriteLine("error in payment");
        }
    }
}