This document reflects the status, and planned work in progress, for the compiler team. It is a live document
and will be updated as work progresses, features are added / removed, and as work on feature progresses.
This is not an exhaustive list of our features but rather the ones which have active development
efforts behind them.
Feature
Branch
State
Developer
Reviewer
LDM Champ
DIM for Static Members DefaultInterfaceImplementation Merged into 17.3p2 AlekseyTs 333fred , jcouv MadsTorgersen
Numeric IntPtr numeric-intptr Merged into 17.3p2 jcouv cston , 333fred jcouv
Unsigned Right Shift UnsignedRightShift Merged into 17.3p1 AlekseyTs 333fred , jcouv AlekseyTs
Utf8 String Literals Utf8StringLiterals Merged into 17.3p1 AlekseyTs cston , RikkiGibson MadsTorgersen
Pattern matching on ReadOnlySpan<char> patterns-span-char Merged into 17.3p1 YairHalberstadt cston , RikkiGibson jcouv
Checked Operators CheckedUserDefinedOperators Merged into 17.3p1 AlekseyTs 333fred , chsienki AlekseyTs
auto-default structs main
Merged into 17.3p1 RikkiGibson cston , jcouv
Newlines in interpolations main
Merged in 17.1p1 CyrusNajmabadi jcouv , chsienki CyrusNajmabadi
List patterns list-patterns Merged in 17.1p2 alrz jcouv , 333fred 333fred
Raw string literals RawStringLiterals Merged into 17.2 CyrusNajmabadi jcouv CyrusNajmabadi
Cache delegates for static method group main
Merged into 17.2 pawchen AlekseyTs , jcouv AlekseyTs
nameof(parameter) main
Merged into 17.3p2 jcouv AlekseyTs , RikkiGibson jcouv
Relaxing Shift Operator main
Merged into 17.3p2 AlekseyTs 333fred , jcouv MadsTorgersen
Relax ordering of ref and partial modifiers ref-partial In Progress
alrz gafter jcouv
Generic attributes generic-attributes Merged into 17.0p4 (preview langver) AviAvni RikkiGibson , jcouv mattwar
Default in deconstruction decon-default Implemented jcouv gafter jcouv
Semi-auto-properties semi-auto-props In Progress Youssef1313 333fred , RikkiGibson CyrusNajmabadi
Required members required-members In Progress 333fred jcouv , RikkiGibson 333fred
Top Level statement attribute specifiers main-attributes In Progress chsienki cston , 333fred jaredpar
Primary Constructors primary-constructors In Progress TBD
TBD
MadsTorgersen
Params Span<T> + Stackalloc any array type params-span In Progress cston TBD
jaredpar
nameof accessing instance members main
In Progress YairHalberstadt 333fred , AlekseyTs 333fred
ref fields ref-fields In Progress cston RikkiGibson , AlekseyTs jaredpar
File types file-types In Progress RikkiGibson jcouv , cston stephentoub
Feature
Branch
State
Developer
Reviewer
LDM Champ
Record structs record-structs Merged into 16.11 jcouv AlekseyTs , RikkiGibson jcouv
Global Using Directive GlobalUsingDirective Merged into 16.11 AlekseyTs 333fred , cston AlekseyTs
Improved Definite Assignment improved-definite-assignment Merged into 17.0 RikkiGibson jcouv jaredpar
Constant Interpolated Strings main
Merged into 16.9p3 kevinsun-dev 333fred jaredar , agocke
Extended property patterns extended-property-patterns Merged into 17.0 alrz jcouv , 333fred 333fred
Sealed record ToString main
Merged thomaslevesque jcouv 333fred
Source Generator V2 APIs features/source-generators Merged into 17.0p2 chsienki rikkigibson , jaredpar , cston N/A
Mix declarations and variables in deconstruction main
Merged into 16.10 YairHalberstadt jcouv MadsTorgersen
Async method builder override main
Merged into 17.0p2 jcouv cston , RikkiGibson stephentoub
Enhanced #line directive main
Merged into 17.0p2 cston jcouv , RikkiGibson MadsTorgersen
Lambda improvements main
Merged into 17.0p2 cston 333fred , jcouv jaredpar
Static Abstract Members In Interfaces C# 10 Preview main
Merged into 17.0p2 AlekseyTs 333fred , RikkiGibson MadsTorgersen
Interpolated string improvements main
Merged into 17.0p3 333fred AlekseyTs , chsienki jaredpar
File-scoped namespace main
Merged into 17.0p3 RikkiGibson jcouv , chsienki CyrusNajmabadi
Parameterless struct constructors struct-ctors Merged into 17.0p3 cston jcouv , 333fred jcouv
Caller expression attribute main
Merged into 17.0p3 Youssef1313 333fred ,AlekseyTs jcouv
Is target version a guarantee? : No. It's explicitly not a guarantee. This is just the planned and ongoing work to the best of our knowledge at this time.Where are these State values defined? : Take a look at the Developing a Language Feature document.
