Hi

i am trying to order examine results based on date time property like bellow

 if (ExamineManager.Instance.TryGetIndex("ExternalIndex", out var index))
        {
            var searcher = index.GetSearcher();
            ISearchResults results = null;
            results = searcher.CreateQuery()
                            .Field("path", newsSource.Path.ToString().MultipleCharacterWildcard()).And()
                            .Field("__IndexType", "content")
                            .And().Field("__NodeTypeAlias", "newsItem").And().Field("disabled","0")
                            .OrderByDescending(new SortableField[] { new SortableField("publish_time") }).Execute();

but i think that didn't work a already changed the index type of property from text string to date time but i still get the results without ordering.

any idea ?