Im wondering if this code can be made into a more clear and fluent one?

using System;
using System.Threading.Tasks;
using Windows.Data.Json;
using System.Collections.ObjectModel;
using System.Net.Http;
using System.Collections.Generic;
using Newtonsoft.Json;
using System.Linq;
using eTest.Space.Log;
using eTest.Space.Interface;
using eTest.Objects;

namespace eTest.Space.Services
{

    public class WorkGroupDataService : IWorkgroupDataService
    {
 

        public string WebApiUri
        {
            get { return Constants.ServerAddress; }
        }

        private ObservableCollection<IWorkgroup> Groups;// = new ObservableCollection<IWorkgroup>();

        public async Task<ObservableCollection<IWorkgroup>> GetAllWorkGroups()
        {
            Groups = new ObservableCollection<IWorkgroup>();
            //if (Groups.Count == 0)
            {
                Uri dataUri = new Uri(WebApiUri + "api/workgroup/");

                using (var client = new Windows.Web.Http.HttpClient())
                {
                    var response = await client.GetAsync(dataUri).AsTask(); ;

                    string jsonText = response.Content.ReadAsStringAsync().GetResults();
                    JsonArray jsonArray = JsonArray.Parse(jsonText);

                    foreach (JsonValue groupValue in jsonArray)
                    {
                        JsonObject groupObject = groupValue.GetObject();
                        IWorkgroup group = new Workgroup();
                        group.GroupState = (int)groupObject["GroupState"].GetNumber();
                        group.WorkgroupName = groupObject["WorkgroupName"].GetString();
                        group.WorkgroupSecretary = groupObject["WorkgroupProba"].GetString();
                        group.ObjectID = groupObject["ObjectID"].GetString();
                        Uri dataUri1 = new Uri(WebApiUri + "api/etest/" + group.ObjectID);
                        using (var client1 = new Windows.Web.Http.HttpClient())
                        {
                            var response1 = await client.GetAsync(dataUri1).AsTask();
                            if (response1.StatusCode == Windows.Web.Http.HttpStatusCode.Ok)
                            {
                                string jsonText1 = response1.Content.ReadAsStringAsync().GetResults();
                                List<TestSession> Test = JsonConvert.DeserializeObject<List<TestSession>>(jsonText1);
                                group.Test = Test;
                            }
                        }
                        if (group.Test.Count > 0)
                        {
                            Groups.Add(group);
                        }
                            
                    }
                }
            }
            Groups = new ObservableCollection<IWorkgroup>(Groups.OrderByDescending((x => x.Test.Count)));
            return Groups;
        }
    }
}