Steven Giesel 5/18/2026

Zstandard compression in .NET 11

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This article introduces Zstandard (Zstd) compression support in .NET 11, detailing new types in System.IO.Compression: ZstandardStream, ZstandardEncoder/Decoder, ZstandardDictionary, and ZstandardCompressionOptions. It covers simple streaming usage, Span-based one-shot APIs, quality levels from -7 to 22, and integration with ASP.NET Core response compression. Zstandard offers faster decompression than DEFLATE with comparable ratios, and is used in Linux kernel, AWS Redshift, and Nintendo Switch. The API follows the Brotli pattern for familiarity.

Zstandard compression in .NET 11

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