protected virtual void OnEditorWindowCloseCanExecute(object sender, CanExecuteRoutedEventArgs e)
{
Window window = (Window)sender;
PropertyGridProperty prop = window.DataContext as PropertyGridProperty;
if (prop != null)
{
prop.CanExecute(sender, e);
if (e.Handled)
{
return;
}
}
e.CanExecute = true;
}