dotnet/runtime Issues | Good First Issue

Stars: (17,886 stars)
Forks: (5,445 forks)
Indexed issues: (385 indexed issues)
open beginner issues: (364 open beginner issues)
Latest indexed: Jun 11, 2026
Last GitHub push: May 15, 2026
License: MIT License
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Dominant language: C#
PR merge metrics: (Avg merge 12d 11h) (661 merged PRs in 30d)
Beginner labels: help wantedgood first issue

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Issues

364 open indexed issues

RSS Atom

Open

Discrepancies in Utf8JsonReader between single- and multi-segment modes for invalid JSON

area-System.Text.Jsonhelp wanted

dotnet/runtime #30,706 opened Aug 28, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

10 comments1 reaction0 assignees

Open

Enable specification of function ranges for JIT config values

area-CodeGen-coreclrhelp wanted

dotnet/runtime #13,307 opened Aug 23, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

3 comments0 reactions0 assignees

Open

Efficient API to stream from a MetadataReader to a MetadataBuilder with modifications

area-System.Reflection.Metadatahelp wanted

dotnet/runtime #30,443 opened Jul 31, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

10 comments1 reaction0 assignees

Open

.Net Core 2.2 console application : System.Private.CoreLib System.ArgumentOutOfRangeException (FileSystemWatcher)

area-Extensions-FileSystembughelp wantedos-windows

dotnet/runtime #36,406 opened Jun 3, 2019 · C# · 17,886 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

10 comments0 reactions1 assignee

Open

Problems reading embedded resources using system.reflection.metadata

area-System.Reflection.Metadatahelp wanted

dotnet/runtime #29,511 opened May 10, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

1 comment0 reactions0 assignees

Open

[EventPipe] Null passed as an event argument causes crash

area-Tracing-coreclrhelp wanted

dotnet/runtime #12,662 opened May 8, 2019 · C# · 17,886 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

8 comments1 reaction1 assignee

Open

ILAsm: Fail on string literals containing "... /* ..." within disabled #ifdef block

Priority:3area-ILTools-coreclrbughelp wanted

dotnet/runtime #12,418 opened Apr 4, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

9 comments0 reactions0 assignees

Open

Create a jitstd linked list

JitUntriagedarea-CodeGen-coreclrenhancementhelp wanted

dotnet/runtime #12,371 opened Mar 29, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

0 comments0 reactions0 assignees

Open

Iterating with ForEach over Immutable collections is very slow

area-System.Collectionshelp wantedtenet-performance

dotnet/runtime #29,092 opened Mar 27, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

12 comments6 reactions0 assignees

Open

Indexer.Set of List is much slower than Array

area-CodeGen-coreclrhelp wantedtenet-performance

dotnet/runtime #29,091 opened Mar 27, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

10 comments4 reactions0 assignees

Open

Consider updating the HWIntrinsic test generation code to support an array of input values.

area-CodeGen-coreclrhelp wantedtest-enhancement

dotnet/runtime #12,344 opened Mar 26, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

1 comment2 reactions0 assignees

Open

Eliminate insGroup overflow allocation platform differences

area-CodeGen-coreclrhelp wanted

dotnet/runtime #12,303 opened Mar 20, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

0 comments0 reactions0 assignees

Open

Need infrastructure to run tests in varying hardware intrinsic modes

area-Infrastructure-librarieshelp wanted

dotnet/runtime #950 opened Mar 18, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

13 comments3 reactions0 assignees

Open

Facades and NotSupported assemblies are bloated with resources they don't use

area-Infrastructure-librariesenhancementhelp wanted

dotnet/runtime #28,888 opened Mar 6, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

9 comments2 reactions0 assignees

Open

CodeGen: Clarify the naming and usage of consumeReg methods

area-CodeGen-coreclrdocumentationhelp wanted

dotnet/runtime #12,179 opened Mar 4, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

0 comments0 reactions0 assignees

Open

ARM/ARM64 returns an incorrect result for `pow(x, 1)`

Priority:3arch-arm32arch-arm64area-System.Numericsbughelp wanted

dotnet/runtime #12,139 opened Feb 27, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

7 comments0 reactions0 assignees

Open

System.IO.Ports Flow Control?

area-System.IO.Portshelp wanted

dotnet/runtime #28,639 opened Feb 7, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

4 comments0 reactions0 assignees

Open

Incorrect use of DisableMediaInsertionPrompt

area-System.IOhelp wanted

dotnet/runtime #28,605 opened Feb 1, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

7 comments0 reactions0 assignees

Open

Better error message when not loading native shared library

area-Interop-coreclrhelp wanted

dotnet/runtime #11,891 opened Jan 25, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

4 comments4 reactions0 assignees

Open

JIT: conditionalize COMPlus variable setting

area-CodeGen-coreclrhelp wanted

dotnet/runtime #11,854 opened Jan 19, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

0 comments0 reactions0 assignees

Stars: (17,886 stars)
Forks: (5,445 forks)
Indexed issues: (385 indexed issues)
open beginner issues: (364 open beginner issues)
Latest indexed: Jun 11, 2026
Last GitHub push: May 15, 2026
License: MIT License
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Dominant language: C#
PR merge metrics: (Avg merge 12d 11h) (661 merged PRs in 30d)
Beginner labels: help wantedgood first issue

Issues

364 open indexed issues

RSS Atom

Open

Discrepancies in Utf8JsonReader between single- and multi-segment modes for invalid JSON

area-System.Text.Jsonhelp wanted

dotnet/runtime #30,706 opened Aug 28, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

10 comments1 reaction0 assignees

Open

Enable specification of function ranges for JIT config values

area-CodeGen-coreclrhelp wanted

dotnet/runtime #13,307 opened Aug 23, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

3 comments0 reactions0 assignees

Open

Efficient API to stream from a MetadataReader to a MetadataBuilder with modifications

area-System.Reflection.Metadatahelp wanted

dotnet/runtime #30,443 opened Jul 31, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

10 comments1 reaction0 assignees

Open

.Net Core 2.2 console application : System.Private.CoreLib System.ArgumentOutOfRangeException (FileSystemWatcher)

area-Extensions-FileSystembughelp wantedos-windows

dotnet/runtime #36,406 opened Jun 3, 2019 · C# · 17,886 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

10 comments0 reactions1 assignee

Open

Problems reading embedded resources using system.reflection.metadata

area-System.Reflection.Metadatahelp wanted

dotnet/runtime #29,511 opened May 10, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

1 comment0 reactions0 assignees

Open

[EventPipe] Null passed as an event argument causes crash

area-Tracing-coreclrhelp wanted

dotnet/runtime #12,662 opened May 8, 2019 · C# · 17,886 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

8 comments1 reaction1 assignee

Open

ILAsm: Fail on string literals containing "... /* ..." within disabled #ifdef block

Priority:3area-ILTools-coreclrbughelp wanted

dotnet/runtime #12,418 opened Apr 4, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

9 comments0 reactions0 assignees

Open

Create a jitstd linked list

JitUntriagedarea-CodeGen-coreclrenhancementhelp wanted

dotnet/runtime #12,371 opened Mar 29, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

0 comments0 reactions0 assignees

Open

Iterating with ForEach over Immutable collections is very slow

area-System.Collectionshelp wantedtenet-performance

dotnet/runtime #29,092 opened Mar 27, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

12 comments6 reactions0 assignees

Open

Indexer.Set of List is much slower than Array

area-CodeGen-coreclrhelp wantedtenet-performance

dotnet/runtime #29,091 opened Mar 27, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

10 comments4 reactions0 assignees

Open

Consider updating the HWIntrinsic test generation code to support an array of input values.

area-CodeGen-coreclrhelp wantedtest-enhancement

dotnet/runtime #12,344 opened Mar 26, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

1 comment2 reactions0 assignees

Open

Eliminate insGroup overflow allocation platform differences

area-CodeGen-coreclrhelp wanted

dotnet/runtime #12,303 opened Mar 20, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

0 comments0 reactions0 assignees

Open

Need infrastructure to run tests in varying hardware intrinsic modes

area-Infrastructure-librarieshelp wanted

dotnet/runtime #950 opened Mar 18, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

13 comments3 reactions0 assignees

Open

Facades and NotSupported assemblies are bloated with resources they don't use

area-Infrastructure-librariesenhancementhelp wanted

dotnet/runtime #28,888 opened Mar 6, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

9 comments2 reactions0 assignees

Open

CodeGen: Clarify the naming and usage of consumeReg methods

area-CodeGen-coreclrdocumentationhelp wanted

dotnet/runtime #12,179 opened Mar 4, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

0 comments0 reactions0 assignees

Open

ARM/ARM64 returns an incorrect result for `pow(x, 1)`

Priority:3arch-arm32arch-arm64area-System.Numericsbughelp wanted

dotnet/runtime #12,139 opened Feb 27, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

7 comments0 reactions0 assignees

Open

System.IO.Ports Flow Control?

area-System.IO.Portshelp wanted

dotnet/runtime #28,639 opened Feb 7, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

4 comments0 reactions0 assignees

Open

Incorrect use of DisableMediaInsertionPrompt

area-System.IOhelp wanted

dotnet/runtime #28,605 opened Feb 1, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

7 comments0 reactions0 assignees

Open

Better error message when not loading native shared library

area-Interop-coreclrhelp wanted

dotnet/runtime #11,891 opened Jan 25, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

4 comments4 reactions0 assignees

Open

JIT: conditionalize COMPlus variable setting

area-CodeGen-coreclrhelp wanted

dotnet/runtime #11,854 opened Jan 19, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

0 comments0 reactions0 assignees

Stars: (17,886 stars)
Forks: (5,445 forks)
Indexed issues: (385 indexed issues)
open beginner issues: (364 open beginner issues)
Latest indexed: Jun 11, 2026
Last GitHub push: May 15, 2026
License: MIT License
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Dominant language: C#
PR merge metrics: (Avg merge 12d 11h) (661 merged PRs in 30d)
Beginner labels: help wantedgood first issue

Loading repository issues...

Issues

364 open indexed issues

RSS Atom

Open

Discrepancies in Utf8JsonReader between single- and multi-segment modes for invalid JSON

area-System.Text.Jsonhelp wanted

dotnet/runtime #30,706 opened Aug 28, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

10 comments1 reaction0 assignees

Open

Enable specification of function ranges for JIT config values

area-CodeGen-coreclrhelp wanted

dotnet/runtime #13,307 opened Aug 23, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

3 comments0 reactions0 assignees

Open

Efficient API to stream from a MetadataReader to a MetadataBuilder with modifications

area-System.Reflection.Metadatahelp wanted

dotnet/runtime #30,443 opened Jul 31, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

10 comments1 reaction0 assignees

Open

.Net Core 2.2 console application : System.Private.CoreLib System.ArgumentOutOfRangeException (FileSystemWatcher)

area-Extensions-FileSystembughelp wantedos-windows

dotnet/runtime #36,406 opened Jun 3, 2019 · C# · 17,886 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

10 comments0 reactions1 assignee

Open

Problems reading embedded resources using system.reflection.metadata

area-System.Reflection.Metadatahelp wanted

dotnet/runtime #29,511 opened May 10, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

1 comment0 reactions0 assignees

Open

[EventPipe] Null passed as an event argument causes crash

area-Tracing-coreclrhelp wanted

dotnet/runtime #12,662 opened May 8, 2019 · C# · 17,886 stars

Why recommendedHas a beginner-friendly label · Contributing guide available

Has a beginner-friendly labelContributing guide available

8 comments1 reaction1 assignee

Open

ILAsm: Fail on string literals containing "... /* ..." within disabled #ifdef block

Priority:3area-ILTools-coreclrbughelp wanted

dotnet/runtime #12,418 opened Apr 4, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

9 comments0 reactions0 assignees

Open

Create a jitstd linked list

JitUntriagedarea-CodeGen-coreclrenhancementhelp wanted

dotnet/runtime #12,371 opened Mar 29, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

0 comments0 reactions0 assignees

Open

Iterating with ForEach over Immutable collections is very slow

area-System.Collectionshelp wantedtenet-performance

dotnet/runtime #29,092 opened Mar 27, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

12 comments6 reactions0 assignees

Open

Indexer.Set of List is much slower than Array

area-CodeGen-coreclrhelp wantedtenet-performance

dotnet/runtime #29,091 opened Mar 27, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

10 comments4 reactions0 assignees

Open

Consider updating the HWIntrinsic test generation code to support an array of input values.

area-CodeGen-coreclrhelp wantedtest-enhancement

dotnet/runtime #12,344 opened Mar 26, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

1 comment2 reactions0 assignees

Open

Eliminate insGroup overflow allocation platform differences

area-CodeGen-coreclrhelp wanted

dotnet/runtime #12,303 opened Mar 20, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

0 comments0 reactions0 assignees

Open

Need infrastructure to run tests in varying hardware intrinsic modes

area-Infrastructure-librarieshelp wanted

dotnet/runtime #950 opened Mar 18, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

13 comments3 reactions0 assignees

Open

Facades and NotSupported assemblies are bloated with resources they don't use

area-Infrastructure-librariesenhancementhelp wanted

dotnet/runtime #28,888 opened Mar 6, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

9 comments2 reactions0 assignees

Open

CodeGen: Clarify the naming and usage of consumeReg methods

area-CodeGen-coreclrdocumentationhelp wanted

dotnet/runtime #12,179 opened Mar 4, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

0 comments0 reactions0 assignees

Open

ARM/ARM64 returns an incorrect result for `pow(x, 1)`

Priority:3arch-arm32arch-arm64area-System.Numericsbughelp wanted

dotnet/runtime #12,139 opened Feb 27, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

7 comments0 reactions0 assignees

Open

System.IO.Ports Flow Control?

area-System.IO.Portshelp wanted

dotnet/runtime #28,639 opened Feb 7, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

4 comments0 reactions0 assignees

Open

Incorrect use of DisableMediaInsertionPrompt

area-System.IOhelp wanted

dotnet/runtime #28,605 opened Feb 1, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

7 comments0 reactions0 assignees

Open

Better error message when not loading native shared library

area-Interop-coreclrhelp wanted

dotnet/runtime #11,891 opened Jan 25, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · Has a beginner-friendly label

No assignee yetHas a beginner-friendly labelContributing guide available

4 comments4 reactions0 assignees

Open

JIT: conditionalize COMPlus variable setting

area-CodeGen-coreclrhelp wanted

dotnet/runtime #11,854 opened Jan 19, 2019 · C# · 17,886 stars

Why recommendedNo assignee yet · No comments yet

No assignee yetNo comments yetHas a beginner-friendly labelContributing guide available

0 comments0 reactions0 assignees

dotnet/runtime

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dotnet/runtime

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dotnet/runtime

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