How to remove NewItemPlaceholder at TreeView wpf

Question

I bind ObservableCollection to ListView and I get {NewItemPlaceholder} line at the end. How can I hide or remove that line?

Answer 1

Suddenly I solved my problem. The problem was that on the same window I had a DataGrid binded to the same collection. I think that I had to make the DataGrid readonly to eliminate that row in the TreeView. However the DataGrid was just for testing purpose so the problem is gone.