Document history - AWS SDK for .NET (V4)
This documentation is a draft for private preview for regions in the AWS European Sovereign Cloud. Documentation content will continue to evolve. Published: January 13, 2026.

Version 4 (V4) of the AWS SDK for .NET has been released!

For information about breaking changes and migrating your applications, see the migration topic.

Document history

The following table describes the important changes since the last release of the AWS SDK for .NET Developer Guide. For notification about updates to this documentation, you can subscribe to an RSS feed.

ChangeDescriptionDate

What's new

Added a note about version 2.0 of the AWS Deploy Tool for .NET CLI.

October 17, 2025

AWS OpsWorks

AWS OpsWorks has reached End of Life. It has been removed from the documentation.

September 16, 2025

What's new

End-of-support has been announced for V3 of the AWS SDK for .NET.

August 21, 2025

What's new

Version 4 of the AWS SDK for .NET is generally available! For information about migrating your applications to V4, see Migrating to version 4.

April 28, 2025

Migrating to version 4 of the AWS SDK for .NET

Included preview information about migraging applications built with the AWS SDK for .NET to version 4.

March 3, 2025

Observability

Announced the GA release for observability

February 10, 2025

What's new

Added information about new default behavior for integrity protection.

January 15, 2025

S3 Encryption Client V4 Migration

Added information about migrating from V2 to V4.

December 9, 2024

What's new

Added information about the fourth preview release of the AWS SDK for .NET version 4.

November 15, 2024