Can I install Paint.Net on linux using mono? I tried downloading and running the Paint.NET installer under mono and got: > Cannot open assembly 'Paint.NET.3.5.8.Install.exe': > File does not contain a valid CIL image. Can this be installed using mono? If it matters, I'm running Ubuntu.

No, Paint.NET will not run on Mono.

There was some (currently abandoned) effort to port it to non-Windows systems.

Also, it has inspired Pinta, a project which is supposed to be drop-in replacement for Paint.NET on non-Windows systems.