<ul><li>The .NET 9 libraries introduce enhancements and optimizations across various libraries.</li><li>Base64Url encoding format is now available, providing a URL-safe alternative to traditional Base64 encoding.</li><li>BinaryFormatter has been fully deprecated in .NET 9 due to security vulnerabilities and risks associated with deserialization attacks.</li><li>Switch to JsonSerializer for safer and more efficient serialization.</li></ul>

What’s New in .NET 9 Libraries: Essential Updates for Developers

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