AWS SDK for .NET v3.x will reach end-of-support on June 1, 2026, with a transition to maintenance mode starting March 1, 2026. Version 4.x of the SDK, available since April 28, 2025, introduces significant bug fixes, performance enhancements, and modernization. While applications using v3.x will function typically, they will only receive critical updates post-March 2026 and will not support new services. After June 1, the SDK will no longer receive any updates or releases, although previous versions will remain accessible via public package managers.
The AWS SDK for .NET v3.x will reach end-of-support on June 1, 2026, after which it will no longer receive updates or releases.
AWS SDK for .NET version 4.x became generally available on April 28, 2025, offering bug fixes, performance enhancements, and modernization for .NET.
Existing applications using AWS SDK for .NET v3.x will continue to function unless there are fundamental changes to how an AWS service operates.
After March 1, 2026, the AWS SDK for .NET v3.x will only receive critical bug fixes and security updates, with no new service support.
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