protected override ICopyCallback GetCopyCallback(string destination) { var callback = base.GetCopyCallback(destination); var icons = _icons; if (icons == null) { return(callback); } return(new CopyCallback(info => { var b = callback?.File(info); return b != null || !icons.Contains(info.Key) ? b : Path.Combine(AcPaths.GetGuiIconsFilename(AcRootDirectory.Instance.RequireValue), Path.GetFileName(info.Key) ?? "icon.tmp"); }, info => callback?.Directory(info))); }