await searchRecursively(@"c:\Users\xPucTu4\Downloads\", new Regex(@"^.*\.mp3", RegexOptions.IgnoreCase));



async Task searchRecursively(string rootPath, Regex searchRegex)
{
    await Task.CompletedTask;
    if (this.QueryCancelToken.IsCancellationRequested)
        return;

    DirectoryInfo di = new(rootPath);
    foreach (var subDir in di.GetDirectories())
    {
        try
        {
            await searchRecursively(subDir.FullName, searchRegex);
        }
        catch { }
    }

    var matches = di.GetFiles()
                    .Where(f => searchRegex.IsMatch(f.Name));
    if (matches.Any())
        matches
        .OrderByDescending(m => m.CreationTime)
        .Select(f => new { f.FullName, f.CreationTime, f.Length, Open = createOpenFolderButton(f.FullName) }).Dump();
}

Button createOpenFolderButton(string fileName)
{
    Button buttonOpenDir = new Button("Open");
    buttonOpenDir.Click += (s, a) =>
    {
        Process.Start("explorer.exe", $"/select,\"{fileName}\"");
    };

    return buttonOpenDir;
}