async Task LoadPostsInCircle(int circle_id) { var list = await _mLearningService.GetPostByCircle(circle_id); PostsList = new ObservableCollection <post_with_username_wrapper>(); foreach (var item in list) { PostsList.Add(new post_with_username_wrapper { post = item }); } _post_image_manager.Clear(); await UpdateUserPostImages(0); }