private static void createSiteLinksFeedMapping(
        AdWordsUser user, SiteLinksDataHolder siteLinksData)
        {
            // Get the FeedItemService.
              FeedMappingService feedMappingService =
            (FeedMappingService) user.GetService(AdWordsService.v201306.FeedMappingService);

              // Map the FeedAttributeIds to the fieldId constants.
              AttributeFieldMapping linkTextFieldMapping = new AttributeFieldMapping();
              linkTextFieldMapping.feedAttributeId = siteLinksData.LinkTextFeedAttributeId;
              linkTextFieldMapping.fieldId = PLACEHOLDER_FIELD_SITELINK_LINK_TEXT;
              AttributeFieldMapping linkUrlFieldMapping = new AttributeFieldMapping();
              linkUrlFieldMapping.feedAttributeId = siteLinksData.LinkUrlFeedAttributeId;
              linkUrlFieldMapping.fieldId = PLACEHOLDER_FIELD_SITELINK_URL;

              // Create the FieldMapping and operation.
              FeedMapping feedMapping = new FeedMapping();
              feedMapping.placeholderType = PLACEHOLDER_SITELINKS;
              feedMapping.feedId = siteLinksData.SiteLinksFeedId;
              feedMapping.attributeFieldMappings =
              new AttributeFieldMapping[] {linkTextFieldMapping, linkUrlFieldMapping};
              FeedMappingOperation operation = new FeedMappingOperation();
              operation.operand = feedMapping;
              operation.@operator = Operator.ADD;

              // Save the field mapping.
              FeedMappingReturnValue result =
              feedMappingService.mutate(new FeedMappingOperation[] {operation});
              foreach (FeedMapping savedFeedMapping in result.value) {
            Console.WriteLine(
            "Feed mapping with ID {0} and placeholderType {1} was saved for feed with ID {2}.",
            savedFeedMapping.feedMappingId, savedFeedMapping.placeholderType,
            savedFeedMapping.feedId);
              }
        }
        /// <summary>
        /// Map the feed for use with Sitelinks.
        /// </summary>
        /// <param name="feedMappingService">The feed mapping service.</param>
        /// <param name="siteLinksFeed">The feed for holding sitelinks.</param>
        private static void createSiteLinksFeedMapping(FeedMappingService feedMappingService,
        SiteLinksFeed siteLinksFeed)
        {
            // Map the FeedAttributeIds to the fieldId constants.
              AttributeFieldMapping linkTextFieldMapping = new AttributeFieldMapping();
              linkTextFieldMapping.feedAttributeId = siteLinksFeed.LinkTextFeedAttributeId;
              linkTextFieldMapping.fieldId = PLACEHOLDER_FIELD_SITELINK_LINK_TEXT;
              AttributeFieldMapping linkUrlFieldMapping = new AttributeFieldMapping();
              linkUrlFieldMapping.feedAttributeId = siteLinksFeed.LinkUrlFeedAttributeId;
              linkUrlFieldMapping.fieldId = PLACEHOLDER_FIELD_SITELINK_URL;

              // Create the FieldMapping and operation.
              FeedMapping feedMapping = new FeedMapping();
              feedMapping.placeholderType = PLACEHOLDER_SITELINKS;
              feedMapping.feedId = siteLinksFeed.SiteLinksFeedId;
              feedMapping.attributeFieldMappings =
              new AttributeFieldMapping[] {linkTextFieldMapping, linkUrlFieldMapping};
              FeedMappingOperation operation = new FeedMappingOperation();
              operation.operand = feedMapping;
              operation.@operator = Operator.ADD;

              // Save the field mapping.
              feedMappingService.mutate(new FeedMappingOperation[] {operation});
        }