title: Refresh DataGrid in WPF
body: <p>using WPF/C#/Entity Framework. I have a <code>DataGrid.ItemsSource</code> bound to some <code>ObservableCollection</code>. Now, I add a new item to the collection but DataGrid doesn't refresh. I call <code>PropertyChanged</code> as well as <code>view.Refresh()</code> but nothing works. Please help me.</p>