public RowToken Create( 
   EditingTemplate template,
   Geometry geometry
)

var myTemplate = ArcGIS.Desktop.Editing.Templates.EditingTemplate.Current;

//Create edit operation and execute
var op = new ArcGIS.Desktop.Editing.EditOperation();
op.Name = "Create my feature";
op.Create(myTemplate, geometry);
op.Execute();

{
  var duplicateFeatures = new EditOperation();
  duplicateFeatures.Name = "Duplicate Features";

  //Duplicate with an X and Y offset of 500 map units
  //At 2.x duplicateFeatures.Duplicate(featureLayer, oid, 500.0, 500.0, 0.0);

  //Execute to execute the operation
  //Must be called within QueuedTask.Run
  var insp2 = new Inspector();
  insp2.Load(featureLayer, oid);
  var geom = insp2["SHAPE"] as Geometry;

  var rtoken = duplicateFeatures.Create(insp2.MapMember, insp2.ToDictionary(a => a.FieldName, a => a.CurrentValue));
  if (duplicateFeatures.Execute())
  {
    var modifyOp = duplicateFeatures.CreateChainedOperation();
    modifyOp.Modify(featureLayer, (long)rtoken.ObjectID, GeometryEngine.Instance.Move(geom, 500.0, 500.0));
    modifyOp.Execute();
  }

}