How can i transform a file stream into a stream of a block blob to download block blobs?

I want to change this code to work with block blobs, but I can't seem to figure it out on my own
// initialize the http content-disposition header to
// indicate a file attachment with the default filename
System.String disHeader = "Attachment; Filename=\"" + "sample.txt" +
Response.AppendHeader("Content-Disposition", disHeader);
// Download the blob to a file stream.
using (FileStream fs = new FileStream(this.Server.MapPath(@"Data\data.txt"), FileMode.Open))
int chunkSize = 4096;
byte[] buffer = new byte[chunkSize];
int read = 0;
Response.AddHeader("Content-Length", fs.Length.ToString());
do
read = fs.Read(buffer, 0, chunkSize);
Response.OutputStream.Write(buffer, 0, read);
} while (read > 0);
fs.Close();
fs.Dispose();
Response.End();

Hi,
What detailed scenario do you want to achieve? If you want to download files from block blob stream, please have a look at below article.
#http://azure.microsoft.com/en-us/documentation/articles/storage-dotnet-how-to-use-blobs/
If I misunderstand, please feel free to let me know.
Best Regards,
Jambor
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