public sealed class KnowledgeGraphConnectionProperties : ArcGIS.Core.Data.Connector 

{
  await QueuedTask.Run(() =>
  {
    //Create a connection properties
    var kg_props =
            new KnowledgeGraphConnectionProperties(new Uri(url));
    //Connect to the KnowledgeGraph datastore
    //KnowledgeGraph datastores contain tables and feature classes
    using (var kg = new KnowledgeGraph(kg_props))
    {
      var connector = kg.GetConnector() as KnowledgeGraphConnectionProperties;
      var uri = connector.PathOrURL;
      var serviceUri = uri.AbsoluteUri;
    }
  });
}