There's a reason that I put 'closed' in quotation marks. Many important parts of .NET are indeed open source. It is also unfair to discount Mono, which is a ver

There's a reason that I put 'closed' in quotation marks. Many important parts of .NET are indeed open source. It is also unfair to discount Mono, which is a very functional implementation of the platform. But even if you assume this 'closedness' for the sake of the argument, his/her comparison was still unfair.