I'm trying to create a zipfile in a MVC method using the DotNetZip components.

Here is my code:

    public FileResult DownloadImagefilesAsZip()
    {
        using (var memoryStream = new MemoryStream())
        {
            using (var zip = new ZipFile())
            {
                zip.AddDirectory(Server.MapPath("/Images/"));
                zip.Save(memoryStream);

                return File(memoryStream, "gzip", "images.zip");
            }
        }
    }

When I run it I get a "Cannot access a closed Stream" error, and I'm not sure why.