FTP downloading issue

See more:

ASP.NET

Actually I created a ftp web page which can download, upload, delete.
This is the code for downloading a particular file from ftp server:

Dim myFtpWebRequest As FtpWebRequest
Dim myFtpWebResponse As FtpWebResponse
Dim myStreamWriter As StreamWriter

myFtpWebRequest =WebRequest.Create("ftp:/ftp page/filename.ext")
myFtpWebRequest.Credentials = New NetworkCredential("username","Password")
myFtpWebRequest.Method = WebRequestMethods.Ftp.DownloadFile
myFtpWebRequest.UseBinary = True
myFtpWebResponse = myFtpWebRequest.GetResponse()
myStreamWriter = New StreamWriter(Server.MapPath(filename.ext))
myStreamWriter.Write(New StreamReader(myFtpWebResponse.GetResponseStream()).ReadToEnd)
myStreamWriter.Close()
litResponse.Text = myFtpWebResponse.StatusDescription
myFtpWebResponse.Close()

This code is working perfect and I can download. But it is downloading the particular file into the web page folder which I created now.
Example: C:\Documents and Settings\Sadhish\My Documents\Visual Studio 2008\WebSites\WebSite4

How can I download a particular file in desktop or C drive.
Example C:/file/downloadfiles

Thanks in advances.