This also works:

        private void datagrid_LoadingRow(object sender, DataGridRowEventArgs e)
        {
            if (((DataGrid)sender).ItemsSource != null)
            {
                Binding newBinding = new Binding("IsMarkedForHide");
                newBinding.Mode = BindingMode.TwoWay;
                e.Row.SetBinding(DataGridRow.VisibilityProperty, newBinding);
            }
        }
 
        private void datagrid_UnloadingRow(object sender, DataGridRowEventArgs e)
        {
            if (((DataGrid)sender).ItemsSource != null)
            {
                e.Row.DataContext = null;
            }
        }