Microsoft extended its legally binding and perpetual community promise to cover the C# and CLI ECMA standards, which was generally seen as a good thing for Linux-centric fans of the C# language as well as for the Mono project. The FSF has responded now, and it’sn't too impressed with Microsoft's move. The article starts with explaining that while Sun may have patents covering Java, and while IBM may have patents covering C compilers, Microsoft is the only large software company that "has declared itself the enemy of GNU/Linux and stated its intention to attack our community with patents". A sensible conclusion here is that Microsoft can certainly pose a threat to the GNU/Linux community.