public async Task <bool> AddToBookmarks(long workId, bool isPublic = true) { try { var result = await tokens.AddMyFavoriteWorksAsync(workId, publicity : ((isPublic) ? "public" : "private")); if (result == null || string.IsNullOrEmpty(result.Item2) == false) { ShowError((result == null) ? "Unknown error." : result.Item2); } return(true); } catch { return(false); } }