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Preview 1 of AWS SDK for .NET V4

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This article discusses the upcoming AWS SDK for .NET V4, which is the first major version of the SDK in 9 years. It provides a preview of the changes and improvements in V4.

Specifically, the article covers:

  • Performance improvements, including a smaller AWSSDK.Core assembly size, faster AWS Lambda cold start times, and reduced memory allocations when parsing responses.
  • Improvements to the AWSSDK.Extensions.NETCore.Setup package, including better intellisense and Native AOT compatibility.
  • Breaking changes, such as using nullable value types, collections being null by default, and an option to revert to V3 behavior for collections.
  • Conclusion highlighting community contributors and plans for adoption and support of V4.


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