Download a file

private void DownloadUserPdf(string userId)

        {

            string path = HttpContext.Server.MapPath(@"~\UserPDF\userPdf.pdf");

            WebClient webClient = new WebClient();

            String dPath = String.Empty;

            RegistryKey rKey = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Internet Explorer\Main");

            if (rKey != null)

                dPath = (String)rKey.GetValue("Default Download Directory");

            if (String.IsNullOrEmpty(dPath))

                dPath = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile) + "\\downloads";

            string filePath = dPath + @"\userFileAgain.pdf";

            webClient.DownloadFile(new Uri(""), filePath);

            Converts the PdfDocument object to byte form.

            byte[] docBytes = stream.ToArray();

            Loads the byte array in PdfLoadedDocument

            CloudStorageAccount storageAccount = CloudStorageAccount.Parse(ConfigurationManager.AppSettings["StorageConnectionString"]); //connection string is copied from Azure storage account's Settings

            CloudBlobClient client = storageAccount.CreateCloudBlobClient();

            CloudBlobContainer myContainer = client.GetContainerReference("assetmarkbat");

            var permissions = myContainer.GetPermissions();

            permissions.PublicAccess = BlobContainerPublicAccessType.Blob;

            myContainer.SetPermissions(permissions);

            CloudBlockBlob blockBlob = myContainer.GetBlockBlobReference(userId + ".pdf");

            blockBlob.Properties.ContentType = "application/pdf";

            blockBlob.UploadFromStream(stream);

            blockBlob.UploadFromByteArray(docBytes, 0, docBytes.Count());

            Save blob contents to a file.

            using (var fileStream = System.IO.File.OpenWrite(@"C:\" + userId + ".pdf"))

            {

                blockBlob.DownloadToStream(fileStream);

            }

        }