Download .net Framework 3.5 -includes .net 2.0 And 3.0- Offline Installer |best| -

Method 2: Turning Windows Features On/Off (Requires Internet)

The filename is dotnetfx35.exe . Do not confuse it with dotnetfx35setup.exe (the web installer). The offline version is larger than 200 MB; the web installer is under 5 MB.

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs Method 2: Official Full Redistributable Microsoft .NET Framework 3.5 Service pack 1 (Full Package) 15 Jul 2024 —

The .NET Framework uses a cumulative architecture for versions 2.0 through 3.5.