/// <remarks/>
 public void payAsync(PaymentInfo param0, object userState) {
     if ((this.payOperationCompleted == null)) {
         this.payOperationCompleted = new System.Threading.SendOrPostCallback(this.OnpayOperationCompleted);
     }
     this.InvokeAsync("pay", new object[] {
                 param0}, this.payOperationCompleted, userState);
 }
 /// <remarks/>
 public void payAsync(PaymentInfo param0) {
     this.payAsync(param0, null);
 }