Hello.

I have created a XamMultiColumnComboEditor with multiple selection based on a behavior. The behavior works perfectly fine, but I need to select elements programmatically from the ViewModel.

I read an article written by Devin Rader who says 'The XamComboEditorSelectedItemsBehavior supports two-way binding,
so changes to the SelectedCustomers collection exposed by the ViewModel will be reflected by the XamComboEditor.'.

http://es.infragistics.com/community/blogs/devin_rader/archive/2011/06/01/using-behaviors-to-synchronize-selected-items-of-infragistics-silverlight-controls-to-a-viewmodel.aspx

In TwoWay binding scenario my application doesn’t work as I expected.  I attach a simple application, to reproduce the issue easily.
The problem is that when I select first element on the list and try to select the last one programmatically (click the button), both of them are selected.
But when I first push the button that adds the last element in ViewModel, no elements are selected.


Any help will be appreciated.