ArcEngine序列化IFeatureRenderer对象

OpenFileDialog openFileDialog1 = new OpenFileDialog();
               openFileDialog1.Filter = "lyr文件(*.lyr)|*.lyr";
            openFileDialog1.InitialDirectory = @"d:\data";
            openFileDialog1.Multiselect = false;
            DialogResult pDialogResult = openFileDialog1.ShowDialog();
            if (pDialogResult != DialogResult.OK)
                return;
            string pFileName = openFileDialog1.FileName;
            axMapControl1.AddLayerFromFile(pFileName);
            //axMapControl1.ActiveView.Refresh();
            axMapControl1.Extent = axMapControl1.FullExtent;
            ILayer player = axMapControl1.get_Layer(0);
            IFeatureLayer pfeatlayer = player as IFeatureLayer;
            IGeoFeatureLayer pgeo=pfeatlayer as IGeoFeatureLayer;
            IFeatureRenderer ren= pgeo.Renderer as IFeatureRenderer;
            IPersistStream stream = ren as IPersistStream;

            ESRI.ArcGIS.esriSystem.IMemoryBlobStream pMemoryBlobStream = new ESRI.ArcGIS.esriSystem.MemoryBlobStreamClass();

            IObjectStream pObjectStream = new ObjectStreamClass();
            pObjectStream.Stream = pMemoryBlobStream;
            IPersistStream pPersistStream = (IPersistStream)ren;
            pPersistStream.Save((IStream)pObjectStream, 0);
            pMemoryBlobStream.SaveToFile(@"d:\a.render");

程序还出现一个错误，修改Ae的Dll引用的属性“嵌入式互操作程序”为false。