What is AWS SDK for .NET V3 maintenance mode?

Starts March 1, 2026: security and critical bugs only. No new features or regions.

When does AWS SDK for .NET V3 reach end of support?

June 1, 2026. Zero updates after. Packages stay on NuGet/GitHub.

How to migrate AWS SDK .NET V3 to V4?

Grab the Migration Guide. Test in dev. Update code for breaks like pagination. Hit GitHub for help.

AWS SDK .NET V3 Enters Maintenance Mode: Your Migration Clock Starts Now

Picture your .NET app humming along on AWS, oblivious to the sunset warning. AWS just flipped the switch: SDK V3 maintenance mode kicks in March 2026, with full end-of-support by June.

theAIcatchup Apr 10, 2026 3 min read

Timeline graphic showing AWS SDK for .NET V3 maintenance and end-of-support dates

⚡ Key Takeaways

AWS SDK .NET V3 enters maintenance March 2026, end-of-support June—migrate to V4 ASAP. 𝕏
V4 brings modular packages, better perf, AOT support; breaking changes are manageable with the guide. 𝕏
This accelerates .NET's AWS growth, echoing .NET Core's triumph—don't get left behind. 𝕏

Written by

Sarah Chen

AI research editor covering LLMs, benchmarks, and the race between frontier labs. Previously at MIT CSAIL.

#.NET AWS #.NET migration #AWS SDK .NET #V3 maintenance #V4 migration #V4 upgrade #maintenance mode

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Originally reported by AWS Developer Blog

⚡ Key Takeaways

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Sarah Chen

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