/// <remarks/>
 public void CreateVendorBillAsync(CreateVendorBillRequest CreateVendorBillRequest, object userState) {
     if ((this.CreateVendorBillOperationCompleted == null)) {
         this.CreateVendorBillOperationCompleted = new System.Threading.SendOrPostCallback(this.OnCreateVendorBillOperationCompleted);
     }
     this.InvokeAsync("CreateVendorBill", new object[] {
                 CreateVendorBillRequest}, this.CreateVendorBillOperationCompleted, userState);
 }
 /// <remarks/>
 public void CreateVendorBillAsync(CreateVendorBillRequest CreateVendorBillRequest) {
     this.CreateVendorBillAsync(CreateVendorBillRequest, null);
 }