static void RegisterSelectNoneOnEmptySpaceClick(object sender, MouseButtonEventArgs e)
{
var ItemsControl = sender as ItemsControl;
if (ItemsControlExtensions.GetSelectNoneOnEmptySpaceClick(ItemsControl) && e.LeftButton == MouseButtonState.Pressed)
{
if ((ItemsControl is TreeView && !e.OriginalSource.Is <TreeViewItem>()) ||
(ItemsControl is DataGrid && !e.OriginalSource.Is <DataGridRow>()) ||
(ItemsControl is ListBox && !e.OriginalSource.Is <ListBoxItem>()))
{
ItemsControl.TryClearSelection();
}
}
}
