/// <remarks/>
 public void DoVoidAsync(DoVoidReq DoVoidReq, object userState) {
     if ((this.DoVoidOperationCompleted == null)) {
         this.DoVoidOperationCompleted = new System.Threading.SendOrPostCallback(this.OnDoVoidOperationCompleted);
     }
     this.InvokeAsync("DoVoid", new object[] {
                 DoVoidReq}, this.DoVoidOperationCompleted, userState);
 }
        /// <summary>
        /// Voids a payment
        /// </summary>
        /// <param name="voidPaymentRequest">Request</param>
        /// <returns>Result</returns>
        public VoidPaymentResult Void(VoidPaymentRequest voidPaymentRequest)
        {
            var result = new VoidPaymentResult();

            string transactionId = voidPaymentRequest.Order.AuthorizationTransactionId;
            if (String.IsNullOrEmpty(transactionId))
                transactionId = voidPaymentRequest.Order.CaptureTransactionId;

            var req = new DoVoidReq();
            req.DoVoidRequest = new DoVoidRequestType();
            req.DoVoidRequest.Version = GetApiVersion();
            req.DoVoidRequest.AuthorizationID = transactionId;


            using (var service2 = new PayPalAPIAASoapBinding())
            {
                if (!_paypalDirectPaymentSettings.UseSandbox)
                    service2.Url = "https://api-3t.paypal.com/2.0/";
                else
                    service2.Url = "https://api-3t.sandbox.paypal.com/2.0/";

                service2.RequesterCredentials = new CustomSecurityHeaderType();
                service2.RequesterCredentials.Credentials = new UserIdPasswordType();
                service2.RequesterCredentials.Credentials.Username = _paypalDirectPaymentSettings.ApiAccountName;
                service2.RequesterCredentials.Credentials.Password = _paypalDirectPaymentSettings.ApiAccountPassword;
                service2.RequesterCredentials.Credentials.Signature = _paypalDirectPaymentSettings.Signature;
                service2.RequesterCredentials.Credentials.Subject = "";

                DoVoidResponseType response = service2.DoVoid(req);

                string error = "";
                bool success = PaypalHelper.CheckSuccess(response, out error);
                if (success)
                {
                    result.NewPaymentStatus = PaymentStatus.Voided;
                    //result.VoidTransactionID = response.RefundTransactionID;
                }
                else
                {
                    result.AddError(error);
                }
            }
            return result;
        }
 /// <remarks/>
 public void DoVoidAsync(DoVoidReq DoVoidReq) {
     this.DoVoidAsync(DoVoidReq, null);
 }