TOCControl AddLayer...

When adding a layer to the TOCControl (in ArcGIS Engine), the layer is shown with symbology beneath it. You can collapse and expand the symbology by clicking the plus or minus icon on the left. The default is expanded mode. Is there a way to add a layer, but the symbology is collapsed? If we add a lot of layers it becomes cumbersome to collapse each one except the ones we are interested in.

Thanks,
Joe