Protect ASP.NET Source code

Question

Merged with Can I protect my ASP.NET application against decompilers?.

Im currently doing some research in how to best protect my source code so that no external parties can view and use my code.

From browsing the web a few ideas have come to mind i.e

1) Publish website into a DLL

2) Code obfuscator

3) 3rd Party

But none i find are really explained that well or shown in detail how to achieve this. Anyone here who could shed some more light on this topic ?

Thanks in advance