title: ZipPackage to create a ZIP of many files - any problems?
body: <p>My ASP.NET app has to create a ZIP file that will consist of several files.
  I do not want to use external libraries. In .NET I have found only ZipPackage. It always adds file '[Content_Types].xml' automatically, but this is acceptable for me.
  However - did not I overlook any other possible problems with ZipPackage?</p>