I am trying to get all the folder inside publication but getting some error

Question

I am trying to get all the folder inside publication. Here is the snapshot of the code I am using

Answer 1

you should use it like this:

RepositoryItemsFilterData repositoryItemsFilterData = new RepositoryItemsFilterData()
{
    BaseColumns = ListBaseColumns.Extended,
    ItemTypes = new[] { ItemType.Folder },
    Recursive = true,
    ShowNewItems = true
};
XElement filterResults = client.GetListXml(publicationId, repositoryItemsFilterData);

i used getlistxml() method but you can use async one. The problem was the filter you used. It expects to work with OrganizationalItem, and publication is not an OrganizationalItem.