Observable Collection event are not fired when an item is changed, only when it is added, removed or moved.
You must implement INotify Property Changed interface in item class, and register each item event in collection.
Installed Visual Studio 6 Enterprise Editon, with no problems. Worse still, if I create a new Project and add MSCOMCTL. OCX (in this case a List View) I am seeing "MSCOMCTL. I've Googled around and searched but can't find a solution that works.OCX from the Project - Doog...issue, same ocx (I think) awhile back.My Collection, but when debugging with Visual Studio it shows me nothing? PS: Main cs has the Data Context = Main View Model Actually I thought Observable Collection doesn't need a On Property Changed (in my case Raise Property Changed), since it already implements INotify Property Changed (msdn.microsoft.com/de-de/library/ms668604.aspx).Anyways, I tried that too and it doesn't seem to work..