get value from parallel for loop using Task.WhenAll

           IList<Note> resources = new List<Note>();
           var tasks = new List<Task>();
            foreach (var item in result)
            {
                tasks.Add(ProcessItem(item));
            }
            await Task.WhenAll(tasks); //get the value from here and initialize into the resources variable

            NoteList noteList = new NoteList ()
            {
                Resources = resources
            };
            return noteList;
            

        private async Task<IList<Note>> ProcessItem(NoteItem item)
        {
            IList<Note> resources = new List<Note>();
            var note= await getNote(item);
            Note resource = _mapper.Map<Note>(note);
            resources.Add(resource);
            return resources;
        }