Silverlight RadGridView refresh

I'm deleting a user from my GridView, but when I delete it. I first need to refresh my page to see the result.

Anybody any idea?

This is where I tr开发者_运维技巧y to rebind the datasource

if (e.PropertyName == "deleted")
            {
                RadGridView1.ItemsSource = null;
                RadGridView1.DataContext = null;
                RadGridView1.DataContext = _viewModel;
                _viewModel.GetCovrUsers();


                RadGridView1.ItemsSource = _viewModel.CovrUsers;
                this._viewModel.PropertyChanged -= _viewModel_PropertyChanged;

            }

You can use Inotify Property change.