Correct .NET 11 RC1 libraries release notes - #10570
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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
jeffhandley
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Sep 9, 2026
| using Aes aes = Aes.Create(); | ||
| aes.Key = RandomNumberGenerator.GetBytes(32); | ||
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| Starting in .NET 11 Preview 7, conversions between `decimal` and binary floating-point types, and conversions from `BigInteger` to binary floating-point types, round the exact source value once to the nearest representable destination value ([dotnet/runtime #130565](https://github.com/dotnet/runtime/pull/130565), [dotnet/runtime #130566](https://github.com/dotnet/runtime/pull/130566)). The previous conversions could lose significant digits or round through an intermediate value, so existing binaries and code rebuilt with a .NET 11 Preview 7 or later SDK can produce different results. |
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We missed catching this breaking change note in the Preview 7 release notes as we didn't document it until RC1.
Please check with @tannergooding before removing this per their comment linked there, and I too thought it was a pretty noteworthy thing to cover, albeit late.
jeffhandley
reviewed
Sep 9, 2026
| ## AES Key Wrap support | ||
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| The `Aes` class now supports the unpadded AES Key Wrap algorithm defined by RFC 3394 ([dotnet/runtime #132477](https://github.com/dotnet/runtime/pull/132477)). The new `EncryptKeyWrap`, `DecryptKeyWrap`, `TryDecryptKeyWrap`, and `GetKeyWrapLength` methods complement the padded AES-KWP APIs added earlier in .NET 11. | ||
| The `Aes` class now supports the unpadded AES Key Wrap algorithm defined by RFC 3394 ([dotnet/runtime #132477](https://github.com/dotnet/runtime/pull/132477)). The new `EncryptKeyWrap`, `DecryptKeyWrap`, `TryDecryptKeyWrap`, and `GetKeyWrapLength` methods complement the padded AES-KWP APIs added in .NET 10. |
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This change is correct; thanks. dotnet/runtime#130490
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CryptographicOperations.FixedTimeEqualslibraries.md