title: FTPWebRequest .NET 3.5 vs 4
body: <p>I have an application that does an FTP connection to an IBM mainframe and all has been working fine.  I then recompiled against .NET 4 and the mainframe no longer accepts the file giving me an error message stating either the file doesn't exist, or I don't have permission for it.</p>
  
  <p>This is what I use to send the file:</p>
  
  <pre><code>Ftp = (FtpWebRequest)FtpWebRequest.Create(FtpAddress + "%2F'" + "EM.MOM.FIMSDATA" + ".AA." + "RR(+1)" + "'");
  </code></pre>
  
  <p>Has Microsoft changed anything between .NET 3.5 and 4 because this points to a framework change?</p>