Curated issues

C# Good First Issues

Browse open source issues tagged with C# in the issue metadata. Results stay focused on work that can become public contribution evidence.

What this list is like

Average annotated difficulty: 3.8/5 across 143,128 issues.
8% of 143,128 time estimates are one day or less.

About C#

Microsoft's .NET language (Anders Hejlsberg, 2000), now cross-platform and used for Windows apps, servers and Unity games.

Beginner friendly Everything

Open All

Users confused about setup project instructions Open

bug

Difficulty 1/5 Under an hour Newbie friendliness 75/100

sillsdev/languageforge-lexbox#2665 · Opened Sep 21, 2026
[Bug] Legal page presents an unsupported FedRAMP SSP Section 13 requirement Open

bug documentation frontend

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

azurenoops/spin_agent#975 · Opened Sep 20, 2026
Tsavorite.test fails to compile on main: TestBase.cs references Garnet.test.TestUtils, which is not linked into Tsavorite.test.csproj Open

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

microsoft/garnet#2161 · 2 comments · Opened Sep 20, 2026
v11 update: Validation attributes are no longer experimental Open

:watch: Not Triaged 11.0 fundamentals/subsvc

Difficulty 2/5 1-3 hours Newbie friendliness 92/100

dotnet/AspNetCore.Docs#37699 · Opened Sep 20, 2026
v11 update: Short-circuit endpoints with an attribute Open

:watch: Not Triaged 11.0 fundamentals/subsvc

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

dotnet/AspNetCore.Docs#37698 · Opened Sep 20, 2026
SE 5.3.0 beta 7: In Settings Video player download buttons aren't together Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

SubtitleEdit/subtitleedit#15108 · 1 comment · Opened Sep 20, 2026
Kubernetes get-started create-component.md: Go and C# silently default isMinikube instead of requiring it, unlike TS/Python/Java/HCL Open

area/docs-content Bug pulumi/docs

Difficulty 1/5 1-3 hours Newbie friendliness 94/100

pulumi/docs#21762 · Opened Sep 20, 2026
[ci-scan-feedback] Read ci-fix head.ref via list/get, not search, to close dedup gap Open

agentic-workflows untriaged

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

dotnet/runtime#134305 · Opened Sep 20, 2026
Create parent directories only after the containment check in InstallHelper.TryExtractToDirectory Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

PowerShell/PSResourceGet#2056 · Opened Sep 20, 2026
Removing the breakpoint doesn't work Open

Status: Waiting triage Type: Bug

Difficulty 1/5 1-3 hours Newbie friendliness 92/100

nanoframework/Home#1850 · Opened Sep 20, 2026
[Mouse Jump] SizeInfo.ScaleToFitRatio zero-check guards the wrong operand Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

microsoft/PowerToys#50675 · 1 comment · Opened Sep 20, 2026
LOLIS LIST信件的To与By署名逻辑反了 Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

LorisYounger/VPet#572 · Opened Sep 20, 2026
DeleteWorkflowLabels ignores version-deleted notifications; store version-delete APIs unused Open

bug core elsa 3 prio low triaged

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

elsa-workflows/elsa-core#8190 · Opened Sep 20, 2026
The new "Mouse highlighter" feature is fantastic, but I would like the settings to be translated into Italian Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

ShareX/ShareX#8859 · Opened Sep 20, 2026
Test failure: Interop Work Item throws System.IO.FileNotFoundException Open

area-System.Reflection blocking-clean-ci-optional Known Build Error os-mac-os-x untriaged

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

dotnet/runtime#134296 · 2 comments · Opened Sep 20, 2026
v11 update: SignalR .NET client supports authentication refresh after redirects Open

11.0 SignalR

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

dotnet/AspNetCore.Docs#37694 · Opened Sep 20, 2026
[Tool] ilrepl: an interactive playground for .NET IL Open

has-image has-license has-readme new-tool ready-to-approve repo-verified

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

shanselman/TinyToolTown#804 · Opened Sep 20, 2026
`RecipeManager` is not a Manager Open

S: Untriaged

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

space-wizards/space-station-14#46090 · Opened Sep 19, 2026
JIT: vpshufbitqmb is missing INS_FLAGS_IsDstDstSrcAVXInstruction Open

area-CodeGen-coreclr untriaged

Difficulty 1/5 Under an hour Newbie friendliness 92/100

dotnet/runtime#134286 · 1 comment · Opened Sep 19, 2026
Guard-rail RPC rejections (-32002/-32005/4444) still log one WARN per request after #13156 Open

bug logging rpc

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

NethermindEth/nethermind#13602 · Opened Sep 19, 2026
[Homebrew] Deprecation notice for "the `verified` parameter in the `url` stanza is deprecated" Open

Difficulty 1/5 Under an hour Newbie friendliness 92/100

microsoft/aspire#20257 · Opened Sep 19, 2026
Importing Data: a TradeBar-derived custom type must set DataType = MarketDataType.Base for typed History and Slice.Get Open

Difficulty 1/5 1-3 hours Newbie friendliness 88/100

QuantConnect/Documentation#2696 · Opened Sep 19, 2026
[ci-scan-feedback] Read ci-fix head.ref via list/get, not search, to close dedup gap Open

agentic-workflows untriaged

Difficulty 1/5 Under an hour Newbie friendliness 78/100

dotnet/runtime#134276 · Opened Sep 19, 2026
RoomJoinedResponse missing max_participants Open

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

ppy/osu-server-spectator#536 · Opened Sep 19, 2026
[Hosts File Editor] IP validation rebuilds a 665-character Regex on every call Open

Product-Hosts File Editor

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

microsoft/PowerToys#50658 · 1 comment · Opened Sep 19, 2026
Compiler Warning NETSDK1187 Open

Difficulty 2/5 1-3 hours Newbie friendliness 62/100

MudBlazor/Translations#432 · 4 comments · 1 reaction · Opened Sep 19, 2026
Incorrect cursor when hovering over button and check box on 'About' tab Open

Bug

Difficulty 2/5 1-3 hours Newbie friendliness 70/100

icsharpcode/ILSpy#4148 · Opened Sep 19, 2026
Copilot PostToolUse hook fails when Windows user profile path contains a space Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

microsoft/vscode-dotnettools#3563 · Opened Sep 19, 2026
C# Doctor: Report error and warning counts separately in the status bar Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

microsoft/vscode-dotnettools#3561 · Opened Sep 19, 2026
C# Doctor: Nest Recommendations content under the selected tab Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

microsoft/vscode-dotnettools#3560 · Opened Sep 19, 2026
C# Doctor: Keep Recheck available on every tab Open

Difficulty 2/5 1-3 hours Newbie friendliness 75/100

microsoft/vscode-dotnettools#3557 · Opened Sep 19, 2026
Update Discord invite link from discord.gg/decentraland to new server Open

3-low bug documentation

Difficulty 2/5 1-3 hours Newbie friendliness 90/100

decentraland/unity-explorer#10170 · 1 comment · Opened Sep 19, 2026
Spectator beatmap auto-download doesn't respect video preference Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

ppy/osu#38860 · 2 reactions · Opened Sep 18, 2026
Path normalization should not check drive letter on non-Windows Open

bug good first issue help wanted

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

ForNeVeR/TruePath#219 · Opened Sep 18, 2026
Remove temporary .NET 11 CI container digest pin Open

Infrastructure Test untriaged

Difficulty 2/5 1-3 hours Newbie friendliness 70/100

dotnet/vscode-csharp#9791 · 1 comment · Opened Sep 18, 2026
CI build flakes: parallel target frameworks race on obj/gitversion.json Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

sillsdev/icu-dotnet#234 · Opened Sep 18, 2026
Normalizer.Normalize silently does NFKD for UNORM_FCD and UNORM_NONE Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

sillsdev/icu-dotnet#232 · Opened Sep 18, 2026
Docker support for net11 dotnet isolated Open

.NET 11

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

Azure/azure-functions-core-tools#5599 · Opened Sep 18, 2026
"Create scratch file from selection" codefix should NOT be the first item in the list Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

madskristensen/ScratchFiles#17 · Opened Sep 18, 2026
Update obsolete Visual C++ Redistributable link Open

Difficulty 1/5 Under an hour Newbie friendliness 95/100

lucasg/Dependencies#301 · Opened Sep 18, 2026
Add official docs for the checkpoint format Open

Feature pulumi/pulumi

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

pulumi/pulumi#24724 · Opened Sep 18, 2026
[Bug] ShipUsesLegacyColours Not Exported. Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

vectorcmdr/NMSE#126 · 1 comment · Opened Sep 18, 2026
[Settings] LanguageHelper.LoadLanguage can leak the language.json file handle on a read failure Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

microsoft/PowerToys#50648 · Opened Sep 18, 2026
[Peek] WebBrowserPreviewer.Dispose(bool) is `async void` and runs from the finalizer, risking a process crash Open

Needs-Team-Response Needs-Triage Product-Peek

Difficulty 2/5 1-3 hours Newbie friendliness 75/100

microsoft/PowerToys#50646 · 2 comments · Opened Sep 18, 2026
[PT Run][Unit Converter] `sqmi` and `sqmil` expand to invalid units, so square-mile conversions return no result Open

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

microsoft/PowerToys#50645 · 1 comment · Opened Sep 18, 2026
Blazor reconnect modal uses white instead of the system Canvas color Open

area-blazor

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

dotnet/aspnetcore#69387 · 1 comment · Opened Sep 18, 2026
RichTextPropertyValueHandler uses the wrong blocks layout key Open

component/core

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

umbraco/Umbraco.AI#396 · Opened Sep 18, 2026
Python: CodeTokenizer splits quoted named-arg values on spaces (NamedArgBlockSyntaxError) Open

python triage

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

microsoft/semantic-kernel#14460 · Opened Sep 18, 2026
Bug: Customize Toolbar light/dark theme options not translated correctly Open

area - toolbar

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

files-community/Files#18976 · 1 comment · Opened Sep 18, 2026
Update to OmniSharp 2.0.0 Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

muhammadsammy/free-vscode-csharp#115 · Opened Sep 18, 2026

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C# Good First Issues

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About C#

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