It seems RavenDb pluralizes object names when storing them. So a PhoneBook becomes PhoneBooks, and PhoneBookCategory becomes PhoneBookCategories.

For any ByQueryOperation, if I write the query, I have to address the name of the collection. E.g. here for a bulk delete:

var queryParameters = new Raven.Client.Parameters
    {
        {
            "ids", ids.ToArray()
        }
    };
var q = new IndexQuery
{
    Query = "from {collectionName} u where id(u) in ($ids)",
    QueryParameters = queryParameters
};
DeleteByQueryOperation op = new DeleteByQueryOperation(q);

Now, how can I make sure I get the correct collectionName?