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Add support for new pattern kinds

meeting: discussThis issue should be discussed at the next TC49-TG2 meetingThis issue should be discussed at the next TC49-TG2 meeting

meeting: priorityReview before meeting. Merge, merge with issues, or reject at the next TC49-TC2 meetingReview before meeting. Merge, merge with issues, or reject at the next TC49-TC2 meeting

Review: completeat least one person has reviewed thisat least one person has reviewed this

type: featureThis issue describes a new featureThis issue describes a new feature

Status: Open (in progress).

dotnet/csharpstandardnumber 873

#873 In dotnet/csharpstandard;

· RexJaeschke opened on Aug 4, 2023

Adding support for default interface function members

meeting: priorityReview before meeting. Merge, merge with issues, or reject at the next TC49-TC2 meetingReview before meeting. Merge, merge with issues, or reject at the next TC49-TC2 meeting

Review: pendingProposal is available for reviewProposal is available for review

type: featureThis issue describes a new featureThis issue describes a new feature

Status: Open (in progress).

dotnet/csharpstandardnumber 681

#681 In dotnet/csharpstandard;

· RexJaeschke opened on Dec 5, 2022

Change precedence of switch expression from relational to unary

Status: Open.

#300 In dotnet/csharpstandard;

· gafter opened on Mar 11, 2019

8.0 Tuple parentheses optional in switch expression and statement

Status: Open.

#576 In dotnet/csharpstandard;

· BillWagner opened on May 11, 2022

Define term "derived interface"

Status: Draft (not ready).

dotnet/csharpstandardnumber 680

#680 In dotnet/csharpstandard;

· RexJaeschke opened on Dec 5, 2022

Expression-bodied members vs. expressions that return nothing

type: bugThe Standard does not describe the language as intended or implementedThe Standard does not describe the language as intended or implemented

Status: Open.

#369 In dotnet/csharpstandard;

· Nigel-Ecma opened on Sep 7, 2021

Must attribute arguments be exactly as shown in Annex C?

type: clarityWhile not technically incorrect, the Standard is potentially confusingWhile not technically incorrect, the Standard is potentially confusing

Status: Open.

#870 In dotnet/csharpstandard;

· KalleOlaviNiemitalo opened on Jul 24, 2023

Interaction of <code>var</code>, <code>nameof</code>, and <code>Color Color</code>

type: bugThe Standard does not describe the language as intended or implementedThe Standard does not describe the language as intended or implemented

Status: Open.

#832 In dotnet/csharpstandard;

· KalleOlaviNiemitalo opened on Jul 2, 2023

ConditionalAttribute on property or event accessor

Status: Open.

#912 In dotnet/csharpstandard;

· KalleOlaviNiemitalo opened on Aug 20, 2023

Reinstate "abstract override"

Status: Open.

#982 In dotnet/csharpstandard;

· jskeet opened on Nov 1, 2023

Check "extra" exceptions

Status: Open.

#1021 In dotnet/csharpstandard;

· jskeet opened on Nov 30, 2023

Prohibit stackalloc int[3][1]

meeting: discussThis issue should be discussed at the next TC49-TG2 meetingThis issue should be discussed at the next TC49-TG2 meeting

Status: Open.

#1232 In dotnet/csharpstandard;

· jskeet opened on Dec 11, 2024

A Proposal to Define Some Container-Related Terms

type: clarityWhile not technically incorrect, the Standard is potentially confusingWhile not technically incorrect, the Standard is potentially confusing

Status: Open.

#1250 In dotnet/csharpstandard;

· RexJaeschke opened on Jan 13, 2025

Issues with is-operator ($12.12.12, §12.12.1, §6.2.5)

Status: Open.

#1285 In dotnet/csharpstandard;

· Nigel-Ecma opened on Mar 8, 2025

Add support for nullable arrays nullables

Status: Draft (not ready).

dotnet/csharpstandardnumber 1287

#1287 In dotnet/csharpstandard;

· Nigel-Ecma opened on Mar 11, 2025

Define rules for "readonly" in <code>struct</code> types

Status: Open.

#1339 In dotnet/csharpstandard;

· BillWagner opened on Jun 3, 2025

Fix tuple assignment

Status: Draft (not ready).

dotnet/csharpstandardnumber 1366

#1366 In dotnet/csharpstandard;

· BillWagner opened on Jul 3, 2025

Property &amp; indexer access not fully updated for ref get accessors

meeting: discussThis issue should be discussed at the next TC49-TG2 meetingThis issue should be discussed at the next TC49-TG2 meeting

meeting: priorityReview before meeting. Merge, merge with issues, or reject at the next TC49-TC2 meetingReview before meeting. Merge, merge with issues, or reject at the next TC49-TC2 meeting

Status: Open.

#1371 In dotnet/csharpstandard;

· Nigel-Ecma opened on Jul 14, 2025

Nullable Spec Issue List

Status: Open.

#1228 In dotnet/csharpstandard;

· gafter opened on Feb 27, 2019

Provide a normative spec reference for all types not in the CLI spec

type: bugThe Standard does not describe the language as intended or implementedThe Standard does not describe the language as intended or implemented

Status: Draft (not ready).

dotnet/csharpstandardnumber 1135

#1135 In dotnet/csharpstandard;

· RexJaeschke opened on Jun 24, 2024

(Possible) Errors in type/member signatures in Annex C, "Standard library"

type: bugThe Standard does not describe the language as intended or implementedThe Standard does not describe the language as intended or implemented

Status: Open.

#1378 In dotnet/csharpstandard;

· RexJaeschke opened on Jul 19, 2025

A non-normative tweak involving the type name ICloneable

type: clarityWhile not technically incorrect, the Standard is potentially confusingWhile not technically incorrect, the Standard is potentially confusing

Status: Open.

#1377 In dotnet/csharpstandard;

· RexJaeschke opened on Jul 19, 2025

Difference between enum AttributeTargets type in C# and CLI specs

Status: Open.

#1376 In dotnet/csharpstandard;

· RexJaeschke opened on Jul 19, 2025

Use of Simple vs. Fully Qualified Type Names in C.2 and C.3

type: clarityWhile not technically incorrect, the Standard is potentially confusingWhile not technically incorrect, the Standard is potentially confusing

Status: Open.

#1375 In dotnet/csharpstandard;

· RexJaeschke opened on Jul 18, 2025

Bug in example in 17.4.6, Interface member access

type: bugThe Standard does not describe the language as intended or implementedThe Standard does not describe the language as intended or implemented

Status: Open.

#638 In dotnet/csharpstandard;

· RexJaeschke opened on Oct 17, 2022