title: ICSharpCode.SharpZipLib.Zip example with crc variable details
body: <p>I am using icsharpziplib dll for zipping sharepoint files using c# in asp.net<br>
  When i open the output.zip file, it is showing "zip file is either corrupted or damaged".
  And the crc value for files in the output.zip is showing as 000000.</p>
  
  <ol>
  <li>How do we calculate or <strong>configure crc value using icsharpziplib dll</strong>?</li>
  <li>Can any one have the good <strong>example how to do zipping using memorystreams</strong>?</li>
  </ol>