AWS SDK for .NET 4.1: Supported Targets, Signing and Upgrade Checks
AWS released SDK for .NET 4.1 on November 11, 2026. It adds dedicated .NET 10 and .NET 11 builds, removes the .NET Core 3.1 build and replaces its optional AWS Common Runtime dependency for SigV4a and CRC64NVME. For an ASP.NET Core team, the first checks are the restored service packages, the runtime target, and any paths that rely on S3 multi-region access points or checksums.