var localCenterlineServiceMPK = new LocalFeatureService() { Path = @"C:\Users\XXX\Documents\PackageMap.mpk" }; localCenterlineServiceMPK.StartCompleted += this.StartCompleted; localCenterlineServiceMPK.StartAsync();private void StartCompleted(object sender, AsyncCompletedEventArgs e) { var centerlineLayerService = sender as LocalFeatureService; var centerlineLayer = new ArcGISLocalFeatureLayer { Service = centerlineLayerService, ID = "Routes", LayerName = "routes", Editable = true, AutoSave = true, ReturnM = true }; this._map.Layers.Add(centerlineLayer); }Solved! Go to Solution.