Improving performance of DataBinding, patience is gold

I came across a performance problem lately. I have a WPF Smart Client application connected to a Dynamics CRM back end. At some point in my application I have add a lot of lines in a data table held by an ObservableCollection class. The problem was each time I add a line into the collection a CollectionChanged event was raised and that triggered the update of some other fields, approximately 10 in my case.