protected void RemoveDeletedFiles()
{
Parallel.ForEach(FileLineMap,
async kvp =>
{
// new to wait on refresh to determine if the file still exists
await Task.Run(() => kvp.Key.Refresh(), CancellationToken);
if (!kvp.Key.Exists && FileLineMap.TryRemove(kvp.Key, out _))
{
OutputFunction.Invoke($"Deleted: {kvp.Key.Name}");
}
});
}