Bootstrap .NET 3.5 Framework

Question

I have a winforms deployment project and am trying to find a way to bootstrap the .NET 3.5 framework in an instance where a user may not have this on their client machine.  I have read that you can do this, but have yet to find a good example.  Does anyone have an example of how to do this?  Do I need to do clickonce to do this?  Please let me know!