public static void OnListBoxPropertyChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
        {
            RadGridView grid = dependencyObject as RadGridView;
			System.Windows.Controls.ListBox listBox = e.NewValue as System.Windows.Controls.ListBox;

            if (grid != null && listBox != null)
            {
                SelectedCellsBindingBehavior behavior = new SelectedCellsBindingBehavior(grid, listBox);
            }
        }
        public static void OnListBoxPropertyChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
        {
            RadGridView grid = dependencyObject as RadGridView;

            System.Windows.Controls.ListBox listBox = e.NewValue as System.Windows.Controls.ListBox;

            if (grid != null && listBox != null)
            {
                SelectedCellsBindingBehavior behavior = new SelectedCellsBindingBehavior(grid, listBox);
            }
        }