ISO/IEC 20619:2023

INTERNATIONAL ISO/IEC
STANDARD 20619
First edition
Information technology — C#
specification suite
Technologies de l'information — Suite de spécification C#
PROOF/ÉPREUVE
Reference number
ISO/IEC 20619:2023(E)
© ISO/IEC 2023

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ISO/IEC 20619:2023(E)
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© ISO/IEC 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii
© ISO/IEC 2023 – All rights reserved

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ISO/IEC 20619:2023(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international
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work.
The procedures used to develop this document and those intended for its further maintenance
are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed
for the different types of document should be noted (see www.iso.org/directives or
www.iec.ch/members_experts/refdocs).
ISO and IEC draw attention to the possibility that the implementation of this document may involve the
use of (a) patent(s). ISO and IEC take no position concerning the evidence, validity or applicability of any
claimed patent rights in respect thereof. As of the date of publication of this document, ISO and IEC had
not received notice of (a) patent(s) which may be required to implement this document. However,
implementers are cautioned that this may not represent the latest information, which may be obtained
from the patent database available at www.iso.org/patents and https://patents.iec.ch. ISO and IEC shall
not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms
and expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT),
see www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by Ecma International (as ECMA-422, C# Specification Suite) and drafted
in accordance with its editorial rules. It was assigned to Joint Technical Committee ISO/IEC JTC 1,
Information technology, and adopted under the “fast-track procedure”.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html and www.iec.ch/national-
committees.
© ISO/IEC 2023 – All rights reserved iii

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ECMA-422
st
1 Edition / December 2022
C# Specification Suite
Reference number

ECMA-123:2009
©
Ecma International 2009

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ISO/IEC 20619:2023(E)
Contents Page
1 Scope . 1
2 Normative references . 1
3 The C# language and library . 1
3.1 C# language specification . 1
3.2 C# library specification . 1
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ISO/IEC 20619:2023(E)
Introduction
C# is a widely used, general-purpose programming language.
Essential components of a C# implementation are described in several individual standards, supplemented by
a technical report. The C# Specification Suite is just a collection of those components, which are developed and
maintained by Ecma International.
The Suite defined by this specification aggregates these components via normative and informative references
to the latest publ
...