Microsoft .NET 1.1 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Microsoft .NET 1.1 reached end of life on 27 Jun 2019. It no longer receives security fixes.
Support timeline
Official dates from the Microsoft .NET release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 16 Nov 2016 | — |
| End of life | 27 Jun 2019 | 7.1 years ago |
| Latest release | 1.1.13 · 15 May 2019 | final |
Where to go from 1.1
Recommended target: Microsoft .NET 10 (supported until 14 Nov 2028).
The newest actively supported branch is Microsoft .NET 10 (latest release 10.0.10).
Frequently asked questions
Is Microsoft .NET 1.1 still safe to use?
Microsoft .NET 1.1 reached end of life on 27 Jun 2019, 2,600 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Microsoft .NET 1.1?
Yes — the final release (1.1.13) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Microsoft .NET 1.1 to?
Upgrade to Microsoft .NET 10, the newest actively supported branch (supported until 14 Nov 2028).