Saving Mail attachments problem in C#

// Create a request for the file
//
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(strInputFileName  );

// We need to pre authenticate the request with our credentials 
// or we won't be given anything
//
request.PreAuthenticate = true;
request.Credentials = MyCredentialCache;

// Get a response and a stream from it
//
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream receiveStream = response.GetResponseStream();

// Create a Binary Reader for the steam we are getting
//
BinaryReader readStream = new BinaryReader(receiveStream);

// Set up an array of bytes to hold the contents of the file we
// are going to read in. Set the array to the same length as the file
//
byte[] binaryData = new byte [response.ContentLength];

// Now we finally read the file into the binary data array
//
readStream.Read(binaryData,0,(int)response.Content  Length);

// Set up the output file name
//
strTempName = strInputFileName.Substring(strInputFileName.LastIn  dexOf("/")+1);
strTempName = strTempName.Replace("%20"," ");
strOutputFileName = "C:\\Robs\\Dev\\MailRig\\" + strTempName;

// Open the output file
//
FileStream fs2 = new FileStream(strOutputFileName, FileMode.CreateNew, FileAccess.Write);

// Output directly to the new binary file
//
fs2.Write(binaryData, 0, binaryData.Length);

fs2.Flush();
fs2.Close();
readStream.Close();
receiveStream.Close();