: Even with the offline package, Windows 11 may occasionally try to "verify" files online. To bypass this entirely, use the DISM method described below.
This guide was tested on Windows 11 Pro 24H2 (build 26100). Last updated April 2026. download net framework 3.5 offline installer windows 11
This allows you to create a lightweight, reusable .NET 3.5 offline installer toolkit. : Even with the offline package, Windows 11