private void Delete(object sender, RoutedEventArgs e)
{
ObservableCollection <FileEntity> fileList = fileListbox.ItemsSource as ObservableCollection <FileEntity>;
if (fileList != null)
{
foreach (var fileEntity in fileList)
{
if (fileEntity.IsChecked)
{
_detailViewModel.Delete(fileEntity.FileId);
}
}
}
}