private void OnStartClick(object sender, RoutedEventArgs e) { if (!OperationControl.DirectoryExists || !ConfirmOperation()) { return; } int conflictCount = OperationControl.GatherPicturePaths(); if (conflictCount > 0 && !ConfirmFileOverwrite(conflictCount)) { return; } OperationWindow opWindow = new OperationWindow(); opWindow.Show(); Close(); }