Make dll downloadable

HomeController.cs

public FileStreamResult Download()
        {
            var fullQualifiedPathToDll = Path.Combine(Server.MapPath("~/"), "bin/ImageResizer.dll");
            var fileInfo = new FileInfo(fullQualifiedPathToDll);
            var myFileStream = new FileStream(fullQualifiedPathToDll, FileMode.Open);
            return File(myFileStream, "application/octet-stream", fileInfo.Name);
        }