[hydromet]

Perception is important as always: being perceived as "open source" is now vogue and seems to be more of a marketing function for large corporate behemoths (most mere mortals have no idea what a "pull request" is but the term "open source" seems to have become more mainstream in recent years).

[sremani]

In their defense, if 100 or so Open Source projects where they (MSFT) accept PR does not convince you, I do not know what will. In this particular project, it could, that core group wants a level quality or functionality or other benchmarks before opening up for PR. It was done before, source was Open Source and incrementally when the core team felt comfortable started accepting Pull requests.

[wmccullough]

I can see your point, but this isn't the case for Microsoft. This framework may be not accepting PR's yet, but just like the other 100+ repositories that do, I'm sure this will join shortly.