newchecksfilesandfolders.cs

private List<string> CheckFilesInFolder(Sftp connection, List<string> paths)
{
    var errors = new List<string>();

    foreach (var path in paths)
    {
        if (connection.DirectoryExists(path))
        {
            var files = connection.GetList(path);
            if (files.Any(f => f.Name.EndsWith(".mp4") || f.Name.EndsWith(".mp3")))
            {
                var guid = GetFileNameWithoutQuality(files.First().Name);
                if (!files.All(f => f.Name.StartsWith(guid + "_")))
                {
                    Console.WriteLine("Failing for program with directory " + path + " and guid " + guid);
                    errors.Add(path);
                }
            }
        }
    }

    return errors;            
}