System.Formats.Asn1

This assembly provides support for reading and writing values encoded under the ITU X.690 Basic Encoding Rules (BER), Canonical Encoding Rules (CER), and Distinguished Encoding Rules (DER) encodings of data types defined in ITU X.680 Abstract Syntax Notation One (ASN.1).

The primary types in this assembly are AsnReader and AsnWriter.

Documentation can be found at https://learn.microsoft.com/dotnet/api/system.formats.asn1

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Deployment

The library is shipped as part of the .NET shared framework and as a NuGet package.