Azure storage manager (Block Blob)

AzureStorageManager.cs

using System;
using System.IO;
using Microsoft.WindowsAzure;
using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.Blob;

namespace AzureProject
{
	public class AzureStorageManager
	{
		private CloudBlobClient blobClient;

		public AzureStorageManager()
		{
			this.InitiateBlobClient();
		}

		public void UploadFile(string containerName, Stream uploadStream, string storageName)
		{
			CloudBlobContainer container = this.GetContainer(containerName);

			CloudBlockBlob blockBlob = container.GetBlockBlobReference(storageName);

			blockBlob.UploadFromStream(uploadStream);
		}

		public byte[] DownloadFile(string containerName, string storageName)
		{
			// Retrieve reference to a previously created container.
			CloudBlobContainer container = this.GetContainer(containerName);

			// Retrieve reference to a blob named "photo1.jpg".
			CloudBlockBlob blockBlob = container.GetBlockBlobReference(storageName);

			using (Stream storageStream = new MemoryStream())
			{
				blockBlob.DownloadToStream(storageStream);

				storageStream.Position = 0;

				byte[] buffer = new byte[16 * 1024];

				using (MemoryStream ms = new MemoryStream())
				{
					int read;

					while ((read = storageStream.Read(buffer, 0, buffer.Length)) > 0)
					{
						ms.Write(buffer, 0, read);
					}

					return ms.ToArray();
				}
			}
		}

		private CloudBlobContainer GetContainer(string containerName)
		{
			CloudBlobContainer container = this.blobClient.GetContainerReference(containerName);
			container.CreateIfNotExists();

			return container;
		}

		private void InitiateBlobClient()
		{
			string storageConnectionString = CloudConfigurationManager.GetSetting("StorageConnection");
			CloudStorageAccount storageAccount = CloudStorageAccount.Parse(storageConnectionString);
			this.blobClient = storageAccount.CreateCloudBlobClient();
		}
	}
}