[EGreg]

How is that any different than a central maintainer of Linux accepting patches and reviewing them before they go in?

The only difference is that you can see the source and test on your own machine first.

MS employees don't have to commit to any codebase they like, but they should be able to obtain the actual source, so that "with enough eyes, all bugs are shallow".

[nightski]

Actually anyone can obtain the source, it's publicly available.

[chrisbennet]

Not sure why you got down voted. I know Microsoft is open sourcing chunks of .net now. Perhaps that chunk wasn't one of them?