I have two different IBindingList classes, one presenting a list of items, and one presenting a list of groups of those same items (so the latter is heirarchical).  When the flat list of items binds to the grid (I'm using a BindingSource), the list has no expandable rows.  When the list of groups binds, each group is an expandable row with the child items under them.  This mostly works, but I am seeing additional bands inserted in the heirarchical view in odd ways, when I bind to that list of groups the second and subsequent time.   Would you know of an example that I could look at of switching data sources on the fly?  Failing that, I'm looking for a workaround to this behavior, and an obvious one would be to completely reset the grid before binding - and I do mean completely reset the grid, settings and contents.  Any suggestions?

Thanks in advance