How do I make VS 2005 target the 1.1 framework?
Two good articles to help you out:
https://blogs.msdn.com/jomo_fisher/archive/2005/04/22/410903.aspx
https://weblogs.asp.net/rmclaws/archive/2005/06/04/410360.aspx
Microsoft is also working on an official whitepaper as well.