private void OnIndexModifierFinishedIndexOperation(object sender, FinishedIndexOperationEventArgs e)
{
if (e.Operation.Action == IndexOperation.OptimizeIndex)
{
this._indexModifier.FinishedIndexOperation -= OnIndexModifierFinishedIndexOperation;
this._settings.LastIndexOptimization = Directory.GetLastWriteTimeUtc(this._settings.IndexPath);
}
}