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Preview 4 of AWS SDK for .NET V4

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This article provides an update on Preview 4 of the upcoming AWS SDK for .NET V4, highlighting some key changes and improvements.

Specifically, the article covers:

  • Changes to the Amazon DynamoDB Object Persistence high-level library, including initialization defaults, operation-specific configuration, and enhanced mocking capabilities.
  • Moving the DynamoDB Streams service client to a separate package, AWSSDK.DynamoDBStreams.
  • Treating the us-east-1 region as a regional-only endpoint for S3, aligning with newer AWS SDKs.
  • Updates to various extension libraries for the V4 SDK, such as Amazon.Extensions.S3.Encryption, Amazon.AspNetCore.DataProtection.SSM, and Amazon.Extensions.Configuration.SystemsManager.
  • Conclusion and call for community testing and feedback.


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