: The modern landing page for all 3.5 SP1 downloads.
: Version 3.5 specifically integrates the updates from .NET Framework 2.0 Service Pack 1 and .NET Framework 3.0 Service Pack 1. net framework 35 includes net 20 and 30 download link
This is the main installer for legacy systems (Windows 7, Vista, XP). Microsoft .NET Framework 3.5 Service Pack 1 : The modern landing page for all 3