How can I copy all KmlNodes (and children nodes) from one KmlDocument to another KmlDocument

Question

IEnumerable<Layer> layers_to_export = this.ViewModel.Map.OperationalLayers.Where(I => I.Name.Equals(activeLayerName)).ToList(); foreach (var layer_to_export in layers_to_export) { if (layer_to_export.Name.EndsWith("kmz") || layer_to_export.Name.EndsWith("KMZ")) { var kml_layer = layer_to_export.Clone() as KmlLayer; await kml_layer.LoadAsync(); KmlDocument kmlDoc = new KmlDocument(); KmlDataset kmlDataset = new KmlDataset(kmlDoc); foreach (var node in kml_layer.Dataset.RootNodes) { kmlDoc.ChildNodes.Add(node); } } } ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ When this code is run, an exception is thrown at line 22: "kmlDoc.ChildNodes.Add(node);". Exception: Esri.ArcGISRuntime.ArcGISRuntimeException: 'Object already owned.: Already owned.' I have found that a similar exception is thrown (from some google searching) when attempting to add a reference of an object that is already being "used" somewhere else. In this case i presume that the node being Add() to the ChildNodes of the kmlDoc is already owned by the kml_layer object, therefore it cannot be added. I am going down the path of recreating everything in the kml from scratch via parsing the kml manually. I feel like this could be done with much less code...but i havent been able to figure it out. Thank you.

DominiqueBroux · Accepted Answer

A KML node can't belong to multiple containers such as KML folders or KML documents.
Before adding a node to a new document you have to remove it from its initial document.

TonyWakim · Accepted Answer

Justin,

Have you tried using KmlNode.SaveAsAsync()?

KmlNode.SaveAsAsync Method