private void MenuProperties_Click(object sender, RoutedEventArgs e)
{
var props = new Properties();
props.Encoding = _encoding;
props.TextSize = SB.TextLength;
PropertiesWindow dlg = new PropertiesWindow(props);
dlg.PG.GroupByCategory = false;
dlg.PG.IsReadOnly = true;
dlg.Owner = this;
if (!dlg.ShowDialog().GetValueOrDefault())
return;
_encoding = props.Encoding;
}