File Identity Lost After Downloading With WebClient

Hello,
My application uploads files to an FTP server. Before uploading, I
calculate the hash value of each file. After downloading, the hash value is
checked.
This works fine when I'm using the FTP protocol for download as well. In
order to avoid the FTP credential overhead, I ahve tried to download via
System.Net.WebClient (WebClient.DownloadFile). This works well, and I can
open the files, but the hash value differs from the original value.
Is there anything added to the files by System.Net.WebClient? If so, any
idea how to get rid of it?
Thanks, Thomas


.

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