ASN.1 Tools for C# — Overview


The OSS® ASN.1 Tools for C# is a powerful development tool for rapidly building applications using ASN.1.

This product features a powerful ASN.1:2015 capable compiler, a runtime DLL with ASN.1 BER, DER, PER, UPER, XER, CXER, E-XER, OER, COER and JSON encoder/decoder engines, and a rich collection of utilities to simplify and speed your development.

You can now use OSS' new ASN.1 IDE which is packed with features that you need to describe your data in ASN.1, syntax-check your ASN.1 schema, generate C# wrappers, debug ASN.1 messages, and more.

Version 4.X has up to 10 times faster encoding/decoding

The compiler takes ASN.1 specifications as input, and generates C# language classes. In addition to core functionalities, the OSS ASN.1/C# compiler offers extensive diagnostic capabilities to minimize your development time and effort.

Support for JSON
and OER
A runtime DLL provides ASN.1 encoding and decoding functions and auxiliary functions to operate on application messages.

Quick Links


More information about how to create, compile and link your ASN.1 application using the ASN.1/C# Tools.

Free Trial

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24x7 Tech Support


We are here: 24 hours a day, 7 days a week.

  • Phone: 1-888-OSS-2761 (USA and Canada)
  • Phone: 1-732-302-9669 (International)
  • Fax: 1-732-302-0023
  • Email:

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