As I understand it (having been for many years) FOSDEM is self-organizing, so if there is to be a dev room, someone from the relevant community needs to step up

As I understand it (having been for many years) FOSDEM is self-organizing, so if there is to be a dev room, someone from the relevant community needs to step up and do the work to organise one. It's not true that FOSDEM as a whole ignores .NET though, one year they even had Scott Hanselman doing his thing there.