public HttpContent Content {get; set;}

{
  //Reference Newtonsoft - Json.Net
  //Reference System.Net.Http
  UriBuilder selfURL = new UriBuilder(ArcGISPortalManager.Current.GetActivePortal().PortalUri)
  {
    Path = "sharing/rest/portals/self",
    Query = "f=json"
  };
  EsriHttpResponseMessage response = new EsriHttpClient().Get(selfURL.Uri.ToString());

  dynamic portalSelf = JObject.Parse(await response.Content.ReadAsStringAsync());
  // if the response doesn't contain the user information then it is essentially
  // an anonymous request against the portal
  if (portalSelf.user == null)
    return;
  string userName = portalSelf.user.username;
}

{
  //Assume that you have executed the "Get the Current signed on User" snippet and have 'userName'
  UriBuilder groupsURL = new UriBuilder(ArcGISPortalManager.Current.GetActivePortal().PortalUri)
  {
    Path = String.Format("sharing/rest/community/users/{0}", signOnUserName),
    Query = "f=json"
  };
  var groupResponse = new EsriHttpClient().Get(groupsURL.Uri.ToString());
  dynamic portalGroups = JObject.Parse(await groupResponse.Content.ReadAsStringAsync());

  string groups = portalGroups.groups.ToString();
}

{
  //http://www.arcgis.com/sharing/search?q=owner:esri&f=json

  UriBuilder searchURL = new UriBuilder(ArcGISPortalManager.Current.GetActivePortal().PortalUri)
  {
    Path = "sharing/rest/search",
    Query = "q=owner:esri&f=json"
  };
  EsriHttpClient httpClient = new EsriHttpClient();
  var searchResponse = httpClient.Get(searchURL.Uri.ToString());
  dynamic resultItems = JObject.Parse(await searchResponse.Content.ReadAsStringAsync());

  long numberOfTotalItems = resultItems.total.Value;
  long currentCount = 0;

  List<dynamic> resultItemList = new List<dynamic>();
  // store the first results in the list
  resultItemList.AddRange(resultItems.results);
  currentCount = currentCount + resultItems.num.Value;
  //Up to 50
  while (currentCount < numberOfTotalItems && currentCount <= 50)
  {
    searchURL.Query = String.Format("q=owner:esri&start={0}&f=json", resultItems.nextStart.Value);
    searchResponse = httpClient.Get(searchURL.Uri.ToString());
    resultItems = JObject.Parse(await searchResponse.Content.ReadAsStringAsync());
    resultItemList.AddRange(resultItems.results);
    currentCount = currentCount + resultItems.num.Value;
  }
}

{
  UriBuilder searchURL = new UriBuilder(ArcGISPortalManager.Current.GetActivePortal().PortalUri)
  {
    Path = "sharing/rest/portals/self",
    Query = "f=json"
  };
  EsriHttpClient httpClient = new EsriHttpClient();
  EsriHttpResponseMessage response = httpClient.Get(searchURL.Uri.ToString());

  dynamic portalSelf = JObject.Parse(await response.Content.ReadAsStringAsync());
  // if the response doesn't contain the user information then it is essentially
  // an anonymous request against the portal
  if (portalSelf.user == null)
    return;
  string userName = portalSelf.user.username;

  searchURL.Path = "sharing/rest/search";
  string webMaps = "(type:\"Web Map\" OR type:\"Explorer Map\" OR type:\"Web Mapping Application\" OR type:\"Online Map\")";
  searchURL.Query = string.Format("q=owner:{0} {1}&f=json", userName, webMaps);

  var searchResponse = httpClient.Get(searchURL.Uri.ToString());
  dynamic resultItems = JObject.Parse(await searchResponse.Content.ReadAsStringAsync());

  long numberOfTotalItems = resultItems.total.Value;
  if (numberOfTotalItems == 0)
    return;

  List<dynamic> resultItemList = new List<dynamic>();
  resultItemList.AddRange(resultItems.results);
  //get the first result
  dynamic item = resultItemList[0];

  string itemID = item.id;
  Item currentItem = ItemFactory.Instance.Create(itemID, ItemFactory.ItemType.PortalItem);

  if (MapFactory.Instance.CanCreateMapFrom(currentItem))
  {
    Map newMap = MapFactory.Instance.CreateMapFromItem(currentItem);
    await ProApp.Panes.CreateMapPaneAsync(newMap);
  }
}

{
  UriBuilder searchURL = new UriBuilder(ArcGISPortalManager.Current.GetActivePortal().PortalUri)
  {
    Path = "sharing/rest/search"
  };
  string layers = "(type:\"Map Service\" OR type:\"Image Service\" OR type:\"Feature Service\" OR type:\"WMS\" OR type:\"KML\")";
  //any public layer content
  searchURL.Query = string.Format("q={0}&f=json", layers);

  EsriHttpClient httpClient = new EsriHttpClient();

  var searchResponse = httpClient.Get(searchURL.Uri.ToString());
  dynamic resultItems = JObject.Parse(await searchResponse.Content.ReadAsStringAsync());

  long numberOfTotalItems = resultItems.total.Value;
  if (numberOfTotalItems == 0)
    return;

  List<dynamic> resultItemList = new List<dynamic>();
  resultItemList.AddRange(resultItems.results);
  //get the first result
  dynamic item = resultItemList[0];

  string itemID = item.id;
  Item currentItem = ItemFactory.Instance.Create(itemID, ItemFactory.ItemType.PortalItem);

  await QueuedTask.Run(() =>
  {
    //Create a LayerCreationParam
    var layerParam = new LayerCreationParams(currentItem);
    // if we have an item that can be turned into a layer
    // add it to the map
    if (LayerFactory.Instance.CanCreateLayerFrom(currentItem))
      LayerFactory.Instance.CreateLayer<FeatureLayer>(layerParam, MapView.Active.Map);
  });
}