Microsoft ships .NET 5.0 Release Candidate 1 (RC1). It is a near-final release of .NET 5.0, and the first of two RCs before the official release in November. RC1 is a “go live” release; you are supported using it in production.
“.NET 5 has seen a wealth of performance improvements, and even though it’s not scheduled for final release until this fall and there’s very likely to be a lot more improvements that find their way in by then, I wanted to highlight a bunch of the improvements that are already available now.”
by Stephen Toub