The 17.0 major release is coming on May 16, 2024! This version brings many exciting improvements to GitLab, but also removes some deprecated features. We are introducing three breaking change windows during which we expect breaking changes to be deployed to GitLab.com. You can read more about it on our blogpost. The second breaking change window begins 2024-04-29 09:00 UTC and ends 2024-05-01 22:00 UTC.
For others struggling to install dotnetFX 3.5 on Windows, this method is simple and easy, relying on just one command and two files (extracted from an official Windows ISO, although I don't precisely recall their location; they were two cab files).