/// <remarks/>
 public void BillUserAsync(BillUserReq BillUserReq, object userState) {
     if ((this.BillUserOperationCompleted == null)) {
         this.BillUserOperationCompleted = new System.Threading.SendOrPostCallback(this.OnBillUserOperationCompleted);
     }
     this.InvokeAsync("BillUser", new object[] {
                 BillUserReq}, this.BillUserOperationCompleted, userState);
 }
 /// <remarks/>
 public void BillUserAsync(BillUserReq BillUserReq) {
     this.BillUserAsync(BillUserReq, null);
 }