public string GetOIDPropertyName()

{
  await QueuedTask.Run(() =>
  {
    //Create a connection properties
    var kg_props =
        new KnowledgeGraphConnectionProperties(new Uri(url));
    using (var kg = new KnowledgeGraph(kg_props))
    {
      //Get the KnowledgeGraph Data Model
      using (var kg_dm = kg.GetDataModel())
      {
        var kg_name = System.IO.Path.GetFileName(
                 System.IO.Path.GetDirectoryName(kg_props.PathOrURL.ToString()));

        System.Diagnostics.Debug.WriteLine(
          $"\r\n'{kg_name}' Datamodel:\r\n-----------------");
        var time_stamp = kg_dm.GetTimestamp();
        var sr = kg_dm.GetSpatialReference();
        System.Diagnostics.Debug.WriteLine($"Timestamp: {time_stamp}");
        System.Diagnostics.Debug.WriteLine($"Sref: {sr.Wkid}");
        System.Diagnostics.Debug.WriteLine(
          $"IsStrict: {kg_dm.GetIsStrict()}");
        System.Diagnostics.Debug.WriteLine(
          $"OIDPropertyName: {kg_dm.GetOIDPropertyName()}");
        System.Diagnostics.Debug.WriteLine(
          $"IsArcGISManaged: {kg_dm.GetIsArcGISManaged()}");
      }
    }
  });
}