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Upgrade version 3.1 to 4

As of .NET 7, the RijndaelManaged class is obsolete and not recommended. The replacement class, AesManaged is backward-compatible with the old class in that messages encrypted with RijdaelManaged can be decrypted by AesManaged and vice versa.

RijdaelEncryptionService

The RijdaelEncryptionService has been removed. Use AesEncryptionService instead. In most cases, upgrading involves replacing all instances of RijndaelEncryptionService with AesEncryptionService. No further code changes are necessary.

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