/// <remarks/>
 public void DoUATPExpressCheckoutPaymentAsync(DoUATPExpressCheckoutPaymentReq DoUATPExpressCheckoutPaymentReq, object userState) {
     if ((this.DoUATPExpressCheckoutPaymentOperationCompleted == null)) {
         this.DoUATPExpressCheckoutPaymentOperationCompleted = new System.Threading.SendOrPostCallback(this.OnDoUATPExpressCheckoutPaymentOperationCompleted);
     }
     this.InvokeAsync("DoUATPExpressCheckoutPayment", new object[] {
                 DoUATPExpressCheckoutPaymentReq}, this.DoUATPExpressCheckoutPaymentOperationCompleted, userState);
 }
 /// <remarks/>
 public void DoUATPExpressCheckoutPaymentAsync(DoUATPExpressCheckoutPaymentReq DoUATPExpressCheckoutPaymentReq) {
     this.DoUATPExpressCheckoutPaymentAsync(DoUATPExpressCheckoutPaymentReq, null);
 }