How do I disconnect an open SDE direct connection?

I am working in an enterprise geodatabase in through Citrix - both the desktop client and SDE (Oracle 11g) are at 10.1.

I often have multiple SDE connections open in ArcCatalog and would like a way to close all of them at once rather than right clicking on each one and selecting disconnect. I don't see any close or disconnect methods and the 'ClearWorkspaceCache_management' method does not close the connection in the ArcCatalog tree.

Does anyone know if there is a way to do this using ArcObjects?

Thank you