.NET Feature Flags | FeatureFlags.app

.NET 8 and 9 End Support on November 10: A Feature Flag Checklist for the Upgrade

Posted October 20, 2026

.NET 8 and .NET 9 stop getting security fixes on November 10, 2026. If you're moving to .NET 10, here is what to check in your feature flags, and why the upgrade is a good time to stop redeploying to flip them.

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