I need to get list of all files supported by some libary (images) in specified directory and all subderictories. Root directory of drive might be chosen and in this case I want to skip system folders like "Windows" and "AppData" (some other?).

For such task I can use Directory.GetFiles() but problem is - it will stop after getting any exception. In this case I need to just ignore noncritical exceptions and skip folders that cause this exception.

This code looks resonable to me. But I want to make sure that it done right.

Please tell me if it should be changed somehow.

public static List<string> FindSupportedFiles(string root)
{
    Queue<string> folders = new Queue<string>();
    List<string> files = new List<string>();
 
    folders.Enqueue(root);
    while (folders.Count != 0)
    {
        string currentFolder = folders.Dequeue();
 
        if (currentFolder.Contains(":\\Windows") ||
             (currentFolder.Contains(":\\Users") && currentFolder.Contains("\\AppData")))
        {
            if (folders.Count != 0) currentFolder = folders.Dequeue();
            continue;
        }
 
        string[] filesInCurrent = null;
        try
        {
            filesInCurrent = Directory.GetFiles(currentFolder, "*.*");
        }
        // Ignore this exceptions
        catch (UnauthorizedAccessException) { }
        catch (PathTooLongException) { }
        catch (DirectoryNotFoundException) { }

        foreach (string f in filesInCurrent)
            if (optimizer.IsSupported(f)) files.Add(f);

        string[] foldersInCurrent = null;
        try
        {
            foldersInCurrent = Directory.GetDirectories(currentFolder);
        }
        // Ignore this exceptions
        catch (UnauthorizedAccessException) { }
        catch (PathTooLongException) { }
        catch (DirectoryNotFoundException) { }

        foreach (string _current in foldersInCurrent)
            folders.Enqueue(_current);
    }
    return files;
}