DEAR PEOPLE FROM THE FUTURE: Here's what we've figured out so far??? I have created an ArcGISLocalFeatureLayer using a local package that i already setup with some data.var localCenterlineServiceMPK = new LocalFeatureService { Path = @C:\myPackage.mpk, MaxRecords = 100000 }; localCenterlineServiceMPK.Start(); var lineLayer = new ArcGISLocalFeatureLayer { Url = localCenterlineServiceMPK.UrlFeatureService + "/0", Service = localCenterlineServiceMPK, ID = "MyLayer", LayerName = "MyLayer", Editable = true, DisableClientCaching = true, AutoSave = false, Mode = FeatureLayer.QueryMode.Snapshot, OutFields = new OutFields { "*" } }; lineLayer.Initialize();I suscribe to the initialize method:centerlineLayer.Initialized += (sender, args) => { var newCenterlineLayer = sender as ArcGISLocalFeatureLayer; centerlineLayer.Update(); this.LayerController.CreateRouteGraphics(routes, newCenterlineLayer); };if i check fot the graphics list in the object newCenterlineLayer before the update it is O;Afther them, it is still 0