Nundina › Discover calendars › Version End-of-Life Dates calendar › Microsoft .NET 9 end of lifeMicrosoft .NET 9 end of life10 November 2026Microsoft .NET 9 stops receiving security updates. Released 12 Nov 2024. Latest version 9.0.21 (13 Oct 2026). Source: endoflife.date.Version End-of-Life Dates calendarMore from this calendar