Example.cs

 public ActionResult GetFileStreamResult(UrlInformation urlInformation, HttpContext context)
        {
            string url = urlInformation.Path;

            string connection = ConfigurationManager.AppSettings["AzureBlobFileSystem.ConnectionString:media"];
            string containerName = ConfigurationManager.AppSettings["AzureBlobFileSystem.ContainerName:media"];

            CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(connection);
            var client = cloudStorageAccount.CreateCloudBlobClient();
            var container = client.GetContainerReference(containerName);
            var blob = container.GetBlockBlobReference(url.Replace("/media/", string.Empty));

            if (!blob.Exists())
            {
                throw new FileNotFoundException(url);
            }

            context.Response.Clear();
            context.Response.Expires = -1;

            ContentDisposition cd = new ContentDisposition
            {
                FileName = urlInformation.FileName,
                Inline = true  // false = prompt the user for downloading;  true = browser to try to show the file inline
            };

            if (context.Response.Headers["content-disposition"] != null)
            {
                context.Response.Headers.Remove("content-disposition");
            }

            context.Response.Headers["content-disposition"] = cd.ToString();
            
            Stream blobStream = blob.OpenRead();
            context.Response.Headers.Add("content-length", blobStream.Length.ToString());
            return new FileStreamResult(blobStream, urlInformation.MimeType);
            
        }