This isn't big because Microsoft has stared sharing source. The source to the .NET framework has been available _without_ ILSpy for years now. This is big beca

This isn't big because Microsoft has stared sharing source. The source to the .NET framework has been available _without_ ILSpy for years now. This is big because Microsoft is truly embracing an open source development model. They've opened most of the .NET platform up to the whole shebang - pull requests, copying code into other projects, forking, all that good stuff.