Engine中可否加载Feature Service？

【解决办法】：
(1) 可以通过FeatureServiceWorkspaceFactory创建工作空间来遍历Feature Service中的要素类，创建矢量图层进行显示，但是图层的渲染信息会丢失。 

IPropertySet propertySet = new PropertySet();

            propertySet.SetProperty(DATABASE, http://localhost:6080/arcgis/r ... Server);

            IWorkspaceFactory workspaceFactory = (IWorkspaceFactory)new ESRI.ArcGIS.Carto.FeatureServiceWorkspaceFactory();

            IWorkspace workspace = workspaceFactory.Open(propertySet, 0);

            IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspace;

            IEnumDataset enumDataset = workspace.get_Datasets(esriDatasetType.esriDTFeatureClass);

            enumDataset.Reset();

            IDataset dataset = enumDataset.Next();

            IGroupLayer groupLayer = new GroupLayerClass();

            groupLayer.Name = FeatureService;

            while (dataset != null)

            {

                string name = dataset.Name;

                IFeatureClass featureClass = featureWorkspace.OpenFeatureClass(name);

                IFeatureLayer featureLayer = new FeatureLayerClass();

                featureLayer.FeatureClass = featureClass;

                groupLayer.Add(featureLayer as ILayer);

                dataset = enumDataset.Next();

            }

            axMapControl1.AddLayer(groupLayer as ILayer, 0);

            axMapControl1.Refresh();

（2）Engine中没有提供类似于IMapServerLayer、IWMSMapLayer等的可以直接加载显示FeatureService的layer，可以在ArcMap中加载该FeatureService后保存为mxd或者.lyr，然后在Engine中显示