C# method for downloading a multimedia asset from SDL Web (Tridion)

DownloadFromTridion.cs

private static Dictionary<string, string> DownloadFromTridion(StreamDownloadClient streamDownloadClient, ComponentData multimediaComponent)
{
  Dictionary<string, string> downloadInfo = null;
  
  // Prepare file for download in local file system
  string originalFileName = Path.GetFileName(multimediaComponent.BinaryContent.Filename);
  string downloadFile = Options.MigrationSupportDirectory + originalFileName;
  FileStream fs = File.Create(downloadFile);
  
  try
  {
    // Read metadata fields from Tridion
    XDocument metadata = XDocument.Parse(multimediaComponent.Metadata);
    var nss = metadata.Root.GetDefaultNamespace();
    string altText = metadata.Root.Element(nss + "AltText") != null ? metadata.Root.Element(nss + "AltText").Value : String.Empty;
    
    // Download asset from Tridion
    byte[] binaryContent = null;
    if (multimediaComponent.BinaryContent.FileSize != -1)
    {
      Stream tempStream = streamDownloadClient.DownloadBinaryContent(multimediaComponent.Id);
      var memoryStream = new MemoryStream();
      tempStream.CopyTo(memoryStream);
      binaryContent = memoryStream.ToArray();
      tempStream.Close();
    }
    if (binaryContent != null)
      fs.Write(binaryContent, 0, binaryContent.Length);
    
    downloadInfo = new Dictionary<string, string>();
    downloadInfo.Add("file", downloadFile);
    downloadInfo.Add("originalFileName", originalFileName);
    downloadInfo.Add("altText", altText);
    downloadInfo.Add("title", multimediaComponent.Title);
  }
  catch(Exception exception)
  {
    log.Error(exception);
  }
  finally
  {
    fs.Close();
  }
  
  return downloadInfo;
}