public SelectionSet GetSelection()

// get the currently selected features in the map
var selectedFeatures = ArcGIS.Desktop.Mapping.MapView.Active.Map.GetSelection();
// get the first layer and its corresponding selected feature OIDs
var firstSelectionSet = selectedFeatures.ToDictionary().First();

// create an instance of the inspector class
var inspector = new ArcGIS.Desktop.Editing.Attributes.Inspector();
// load the selected features into the inspector using a list of object IDs
await inspector.LoadAsync(firstSelectionSet.Key, firstSelectionSet.Value);

QueuedTask.Run(() =>
{

  // get the currently selected features in the map
  var selectedFeatures = ArcGIS.Desktop.Mapping.MapView.Active.Map.GetSelection();

  // get the first layer and its corresponding selected feature OIDs
  var firstSelectionSet = selectedFeatures.ToDictionary().First();

  // create an instance of the inspector class
  var inspector = new ArcGIS.Desktop.Editing.Attributes.Inspector();

  // load the selected features into the inspector using a list of object IDs
  inspector.Load(firstSelectionSet.Key, firstSelectionSet.Value);

  //get the value of
  var pscode = inspector["STATE_NAME"];
  var myGeometry = inspector.Shape;
});

public Task FlashSelectedFeaturesAsync()
{
  return QueuedTask.Run(() =>
  {
    //Get the active map view.
    var mapView = MapView.Active;
    if (mapView == null)
      return;

    //Get the selected features from the map and filter out the standalone table selection.

    //At 2.x
    //var selectedFeatures = mapView.Map.GetSelection()
    //    .Where(kvp => kvp.Key is BasicFeatureLayer)
    //    .ToDictionary(kvp => (BasicFeatureLayer)kvp.Key, kvp => kvp.Value);

    ////Flash the collection of features.
    //mapView.FlashFeature(selectedFeatures);

    var selectedFeatures = mapView.Map.GetSelection();

    //Flash the collection of features.
    mapView.FlashFeature(selectedFeatures);
  });
}