paint.net was created for windows, and has no native support for any other system. with its previous open-source nature, the possibility for alternate versions was available. in may 2007, miguel de icaza officially started a porting project called "paint-mono". this project had partially ported paint.net 3.0 to mono, an open-source implementation of the common language infrastructure on which the .net framework is based. this allowed paint.net to be run on mono-supported platforms, such as linux. this port is no longer maintained and has not been updated since march 2009.