private void _uploadUntrustSignatureListViewDeleteMenuItem_Click(object sender, RoutedEventArgs e)
{
var viewModel = _uploadLinkListView.SelectedItem as LinkViewModel;
if (viewModel == null) return;
foreach (var item in _uploadUntrustSignatureListView.SelectedItems.OfType<string>().ToArray())
{
viewModel.DeleteSignatures.Remove(item);
}
}