Return Field not working on C#

[vangxitrum]

I am using NRediSearch and StackExchange.Redis to work with Redis for my ASP.NET project but I can't set ReturnField for my Query. Here is my code: var query = new Query($"@plain_text:{{{SearchText}}}"); query.SortBy = "offer_id"; query.SortAscending = false; query.Limit((Page-1) * PageSize, PageSize); query.ReturnFields(new FieldName("$.id", "id")); var rs = (await _searchClient.SearchAsync(query)).Documents; plz help