We are upgrading from Sitecore 8.2 to Sitecore 10.1.

The method GetDescendantsByTemplateWithFallback exist in Sitecore.ConentSearch.dll Version 2 but this method is missing in Sitecore.ConentSearch.dll Version 8.


Is there any alternative to GetDescendantsByTemplateWithFallback that can be used in Sitecore 10.1?

  • Does this help you? support.sitecore.com/… Commented Jan 25, 2022 at 6:52
  • @Gaurav agarwal. Thanks for the link but this is something different because the link talks about resolving the error. In my case i am looking for alternative to GetDescendantsByTemplateWithFallback method in Sitecore 10.1 because this method doesn’t exist. Commented Jan 25, 2022 at 9:06

2 Answers 2


LanguageFallbackDataService was marked as obsolete in 9.3.

No replacement was provided in obsolete info.

This kb article describes a bug which is strictly related to GetDescendantsByTemplateWithFallback extension method


I tracked how previous usages in Sitecore were updated and I found one. Here is a code example:


result = property.GetDescendantsByTemplateWithFallback(Templates.PropertyPageTemplateID)


var templateID = new TemplateID(ID.Parse(Templates.PropertyPageTemplateID));
result = property.Axes.GetDescendants().Where(i => i.TemplateID == templateID)

You can create your own extension method and put this implementation there.

Hope it helps.


The following extension method would be equivalent to a deprecated search utility.

public static IEnumerable<Item> GetDescendantsByTemplateWithFallback(this Item rootItem, string templateID) {
  var items = new List<Item>();
  ID templateId = new ID(templateID);
  var index = ContentSearchManager.GetIndex(new SitecoreIndexableItem(rootItem));
  using (var context = index.CreateSearchContext()) {
    items = context.GetQueryable<SearchResultItem>()
                .Where(x => x.TemplateId == templateId &&
                .Select(i => i.GetItem())
  return items;

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