If you want to keep a copy of this class around by holding onto it in a variable after a command
completes, call EnsurePrivateCopy to make sure that this class is not tied to the document. You can
call this function as many times as you want.
RhinoCommon (in RhinoCommon.dll)
public void EnsurePrivateCopy()
Public Sub EnsurePrivateCopy
Rhino for MacSupported in: 5.4
Rhino for WindowsSupported in: 6.2