/// <remarks/>
 public void SearchOrderItemsAsync(SearchOrderItemRequest SearchOrderItemRequest, object userState) {
     if ((this.SearchOrderItemsOperationCompleted == null)) {
         this.SearchOrderItemsOperationCompleted = new System.Threading.SendOrPostCallback(this.OnSearchOrderItemsOperationCompleted);
     }
     this.InvokeAsync("SearchOrderItems", new object[] {
                 SearchOrderItemRequest}, this.SearchOrderItemsOperationCompleted, userState);
 }
 /// <remarks/>
 public void SearchOrderItemsAsync(SearchOrderItemRequest SearchOrderItemRequest) {
     this.SearchOrderItemsAsync(SearchOrderItemRequest, null);
 }