selection Set, CurrentSelection.SelectedItems

[Evgueny]

dear experts.

I need add set to SelectionA and add set to SelectionB without SelectionA. How can i do this? Help me please.

regards. Evgueny;

(and another: example of Selection Sets from api manual not working. output string contained file name only

screen of manual and screen of testprogram in attachment)

[Evgueny]

And method remove not working; For example:
ModelItem setA = doc.CurrentSelection.SelectedItems.First.Parent;
ModelItemCollection setB = new ModelItemCollection();
setB.CopyFrom(doc.Models.RootItems);
setB.Remove(setA);

Why?

[xiaodong_liang]

Hi,

you could call ModelItemCollection.Invert to get the inverted selection (which for SelectionB) . Or you could refer to this blog which provides another way. It gets the un-selected items. It is similar to your scenrio. 

http://adndevblog.typepad.com/aec/2012/06/focusing-on-a-selected-item-and-hide-all-others-using-navi...

As to the API sample in manual, could you provide a small project for invesigation? does it occur with specific model?

[Evgueny]

In my test program I'm copied-pasted example from api manual and messagebox contained file name only. This problem with all navisworks files.