Skip to content

Issues: dotnet/csharplang

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Clear current search query, filters, and sorts
66 Open 97 Closed
66 Open 97 Closed
Author
Filter by author
Loading
Label
Filter by label
Loading
Use alt + click/return to exclude labels
or ⇧ + click/return for logical OR
Projects
Filter by project
Loading
Milestones
Filter by milestone
Loading
Assignee
Filter by who’s assigned
Sort
Sort by
Newest Oldest Most commented Least commented Recently updated Least recently updated Best match
Most reactions
👍 👎 😄 🎉 😕 ❤️ 🚀 👀

Issues list

[Proposal]: Support optional and named arguments in Expression trees Proposal champion Proposal
#9246 opened Mar 20, 2025 by 333fred Working Set
@jaredpar @cston
[Proposal]: Support generics and generic type parameters in aliases Proposal champion Proposal
#9245 opened Mar 20, 2025 by 333fred Backlog
@cston
[Proposal]: Expression blocks Proposal champion Proposal
#9243 opened Mar 20, 2025 by 333fred Working Set
@cston
[Proposal]: Require await to apply nullable postconditions to task-returning calls Proposal champion Proposal
#8679 opened Nov 22, 2024 by RikkiGibson Needs More Work
@RikkiGibson
[Proposal]: Null conditional assignment Proposal champion Proposal
#8677 opened Nov 22, 2024 by RikkiGibson Working Set
@RikkiGibson
[Proposal]: Delegate Type Arguments Improvements Proposal champion Proposal
#8675 opened Nov 22, 2024 by RikkiGibson Backlog
@jaredpar
[Proposal]: Overload Resolution Priority (VS 17.12, .NET 9) Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#7706 opened Nov 19, 2023 by 333fred
2 of 4 tasks
13.0
@333fred
61
[Proposal]: Params Collections (VS 17.10, .NET 9) Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#7700 opened Nov 16, 2023 by MadsTorgersen
1 of 4 tasks
13.0
@MadsTorgersen @AlekseyTs
32
[Proposal]: Let ref structs implement interfaces and substitute into type parameters (VS 17.11, .NET 9) Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#7608 opened Oct 18, 2023 by agocke
2 of 4 tasks
13.0
@agocke
57
[Proposal]: Inline arrays (VS 17.7, .NET 8) Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#7431 opened Aug 8, 2023 by jcouv
3 of 4 tasks
12.0
@AlekseyTs
5
[Proposal]: Method group natural type improvements (VS 17.9, .NET 9) Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#7429 opened Aug 8, 2023 by jcouv
1 of 4 tasks
13.0
@jcouv
[Proposal]: Lock statement pattern (VS 17.10, .NET 9) Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#7104 opened Apr 7, 2023 by stephentoub
3 of 4 tasks
13.0
@stephentoub
99
[Proposal]: method attribute target for records for targeting primary constructor Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#7047 opened Mar 10, 2023 by poizan42
3 of 4 tasks
Working Set
@RikkiGibson
11
[Proposal]: Interceptors Proposal champion Proposal
#7009 opened Feb 27, 2023 by RikkiGibson Working Set
@RikkiGibson
204
is expression evaluating const expression should be considered constant Needs Approved Specification This issue needs an LDM-approved specification Proposal champion Proposal
#6926 opened Jan 28, 2023 by 333fred Any Time
@333fred
5
[Proposal]: Change ref safety errors to warnings in unsafe contexts Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#6476 opened Sep 20, 2022 by jaredpar
1 of 4 tasks
11.0
@jaredpar
19
[Proposal]: Partial properties (VS 17.11, .NET 9) Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#6420 opened Aug 30, 2022 by RikkiGibson
1 of 4 tasks
13.0
@333fred @RikkiGibson
95
Champion: numeric IntPtr Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#6065 opened Apr 26, 2022 by jcouv 11.0
@jcouv
4
[Proposal]: Support default parameter values in lambdas (VS 17.5, .NET 8) Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#6051 opened Apr 22, 2022 by captainsafia
4 tasks done
12.0
@captainsafia
53
[Proposal]: ref readonly method parameters (VS 17.8, .NET 8) Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#6010 opened Apr 12, 2022 by Sergio0694
3 of 4 tasks
12.0
@jaredpar
1
[Proposal]: Auto-default structs Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#5737 opened Feb 9, 2022 by RikkiGibson 11.0
@RikkiGibson
27
[Proposal]: file local types Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#5529 opened Dec 9, 2021 by stephentoub
4 tasks done
11.0
69
[Proposal]: Explicit lambda return type Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#4934 opened Jul 16, 2021 by jcouv
1 of 4 tasks
10.0
@jaredpar
11
[Proposal]: Enhanced #line directives Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#4747 opened May 13, 2021 by tmat
3 of 4 tasks
10.0
@MadsTorgersen
13
[Proposal]: Unsigned right shift operator Implemented Needs ECMA Spec This feature has been implemented in C#, but still needs to be merged into the ECMA specification Proposal champion Proposal
#4682 opened Apr 22, 2021 by AlekseyTs
1 of 4 tasks
11.0
@MadsTorgersen
5
ProTip! Updated in the last three days: updated:>2025-05-16.