public Geometry Shape {get; set;}

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;
});