title: COM-Interop: Change .NET Framework Version from 2.0 to 4.0 - Should I change the Guids also?
body: <p>I like to migrate a COM-Class from 2.0 to 4.0. Would you recommend also to generate new guids for the classes and a different ProgId?</p>
  
  <p>The old Class would not be used anymore. I know I have to re-register the Class, for the new Path of the mscorlib.</p>
  
  <p>MS-Access create an instance auf my COM-Server Class with CreateObject and my COM-Object load some other classes with DI (dot.net 2.0 and in future 4.0)</p>