I'm coding for Android app with this function:

```
protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        SetContentView(Resource.Layout.conversation_list_activity);
        listViewConversationList = FindViewById<ListView>(Resource.Id.listViewConversationPreview);

        string url = ConstantManager.HOST;
        HttpClient oHttpClient = new HttpClient();

        var oTaskGetAsync = oHttpClient.GetAsync(new Uri(url));
        oTaskGetAsync.ContinueWith((oHttpResponseMessage) =>
        {
            var result = oHttpResponseMessage.Result.Content.ReadAsStringAsync().Result;
            listConversationPreview = Newtonsoft.Json.JsonConvert.DeserializeObject<List<ConversationPreview>>(result);
            ConversationAdapter adapter = new ConversationAdapter(this, listConversationPreview);
            RunOnUiThread(() => listViewConversationList.Adapter = adapter);
            listViewConversationList.ItemClick += listViewConversationList_ItemClick;
        });

    }

```

I run it successfully but after I import some Nuget Packae for Android Support Design, now it throw a message like this.

> 
> I/Choreographer( 1962): Skipped 524 frames! The application may be
>  doing too much work on its main thread.
> 
> 
> 

Could you please tell me what I've done wrong?