/// <remarks/>
 public void GetVendorBillsPagingAsync(GetVendorBillsPagingRequest GetVendorBillsPagingRequest, object userState) {
     if ((this.GetVendorBillsPagingOperationCompleted == null)) {
         this.GetVendorBillsPagingOperationCompleted = new System.Threading.SendOrPostCallback(this.OnGetVendorBillsPagingOperationCompleted);
     }
     this.InvokeAsync("GetVendorBillsPaging", new object[] {
                 GetVendorBillsPagingRequest}, this.GetVendorBillsPagingOperationCompleted, userState);
 }
 /// <remarks/>
 public void GetVendorBillsPagingAsync(GetVendorBillsPagingRequest GetVendorBillsPagingRequest) {
     this.GetVendorBillsPagingAsync(GetVendorBillsPagingRequest, null);
 }