internal static IdAndSession GetFolderIdAndSession(BaseFolderId folderId, MailboxSession mailboxSession, IdConverter converter) { if (folderId != null) { return(converter.ConvertFolderIdToIdAndSession(folderId, IdConverter.ConvertOption.IgnoreChangeKey)); } return(new IdAndSession(mailboxSession.GetDefaultFolderId(DefaultFolderType.AllItems), mailboxSession)); }