c# ArcEngine获取发布图层，并在注册SOE后获取图层要素核心代码

            IMapServer3 mapServer = (IMapServer3)serverObjectHelper.ServerObject;//注册图层获取要素层
            IMapServerDataAccess dataAccess = (IMapServerDataAccess)mapServer;
            IFeatureClass pfeatureclass = (IFeatureClass)dataAccess.GetDataSource(mapServer.DefaultMapName, 0);
            GlobelHandler.workSpace = (pfeatureclass as IDataset).Workspace;
            System.Runtime.InteropServices.Marshal.FinalReleaseComObject(pfeatureclass);