async Task LoadUsersInCircle(int circle_id) { var list = await _mLearningService.GetUsersInCircle(circle_id); var userList = new List <user_by_circle_wrapper>(); foreach (var item in list) { userList.Add(new user_by_circle_wrapper { user = item }); } UsersList = new ObservableCollection <user_by_circle_wrapper>(userList); _tmpUsersList = UsersList; _user_image_manager.Clear(); await UpdateUserImages(0); }